Friedrich Air Conditioner MW12C1H User Manual
2 011  
SPLIT TYPE ROOM AIR CONDITIONER  
WALL MOUNTED TYPE  
Models  
MW09C1H  
MR09C1H  
MW12C1H  
MR12C1H  
Indoor Unit  
Outdoor Unit  
Model and product code  
Model and product code  
Voltage range  
115V ~ 60HzM  
115V ~ 60HzM  
Complete unit model  
M09CIH  
Indoor unit model  
MW09CIH  
Outdoor unit model  
MR09CIH  
M12CH  
MW12CIH  
MR12CIH  
3
Summary and features  
Summary and features  
OutdoorUnit  
MR09CIH  
MR012CIH  
Remote control window  
4
IMPORTANT SAFETY INFORMATION  
The information contained in this manual is intended for use by a qualified service  
technician who is familiar with the safety procedures required for installation and repair, and  
who is equipped with the proper tools and test instruments required to service this product.  
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making  
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical  
shock which can be serious or even fatal.  
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be  
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these  
warnings to guard against any bodily injury or property damage which may result to you or others.  
Your safety and the safety of others are very important.  
We have provided many important safety messages in this manual and on your appliance. Always read, understand and obey  
all safety messages.  
This is a safety Alert symbol.  
This symbol alerts you to potential hazards that can kill or hurt you and others.  
All safety messages will follow the safety alert symbol with the word “WARNING” or “CAUTION”.  
These words mean:  
You can be killed or seriously injured if you do not follow instructions.  
WARNING  
You can receive minor or moderate injury if you do not follow instructions.  
CAUTION  
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what will  
happen if the instructions are not followed.  
A message to alert you of potential property damage will have the word “NOTICE”.  
Potential property damage can occur if instructions are not followed.  
NOTICE  
PERSONAL INJURY OR DEATH HAZARDS  
ELECTRICAL HAZARDS:  
•
Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenance,  
or service.  
•
•
•
Make sure to follow proper lockout/tag out procedures.  
Always work in the company of a qualified assistant if possible.  
Capacitors, even when disconnected from the electrical power source, retain an electrical charge  
potential capable of causing electric shock or electrocution.  
•
•
Handle, discharge, and test capacitors according to safe, established, standards, and approved  
procedures.  
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary  
to test or troubleshoot equipment with the power on to the unit.  
5
•
•
Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,  
and sleeve on the room side of the air conditioning unit while cleaning.  
Electrical component malfunction caused by water could result in electric shock or other electrically  
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.  
•
•
•
•
•
•
•
Never operate the A/C unit with wet hands.  
Use air conditioner on a single dedicated circuit within the specified amperage rating.  
Use on a properly grounded outlet only.  
Do not remove ground prong of plug.  
Do not cut or modify the power supply cord.  
Do not use extension cords with the unit.  
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,  
goggles, clothing, adequately insulated tools, and testing equipment etc.  
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.  
REFRIGERATION SYSTEM REPAIR HAZARDS:  
•
•
•
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before  
opening system for repair.  
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor  
to moderate injury.  
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s flame or hot  
surfaces can cause serious burns.  
•
•
•
Make sure to protect personal and surrounding property with fire proof materials.  
Have a fire extinguisher at hand while using a torch.  
Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever  
possible.  
•
•
•
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for  
leaks, flushing etc.  
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,  
safety glasses, clothing etc.  
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.  
MECHANICAL HAZARDS:  
•
Extreme care, proper judgment and all safety procedures must be followed when testing,  
troubleshooting, handling, or working around unit with moving and/or rotating parts.  
•
Be careful when, handling and working around exposed edges and corners of the sleeve, chassis,  
and other unit components especially the sharp fins of the indoor and outdoor coils.  
•
•
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.  
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.  
6
PROPERTY DAMAGE HAZARDS  
FIRE DAMAGE HAZARDS:  
•
•
•
•
•
•
•
•
Read the Installation/Operation Manual for the air conditioning unit prior to operating.  
Use air conditioner on a single dedicated circuit within the specified amperage rating.  
Connect to a properly grounded outlet only.  
Do not remove ground prong of plug.  
Do not cut or modify the power supply cord.  
Do not use extension cords with the unit.  
Be extremely careful when using acetylene torch and protect surrounding property.  
Failure to follow these instructions can result in fire and minor to serious property damage.  
WATER DAMAGE HAZARDS:  
•
Improper installation, maintenance or servicing of the air conditioner unit can result in water damage  
to personal items or property.  
•
•
•
Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit.  
Do not drill holes in the bottom of the drain pan or the underside of the unit.  
Failure to follow these instructions can result in damage to the unit and/or minor to serious property  
damage.  
7
Specifications  
Outdoor Unit MR09C1H  
Model  
Function  
Rated Voltage  
Frequency  
(Inverter different Compressor  
speed)  
COOLING  
115V~  
70  
High  
Standard  
Low  
Hz  
Hz  
Hz  
41  
15  
Total Capacity  
(Inverter different Compressor  
speed)  
High  
W / Btu/h  
3100/10600  
2650/9000  
1300/4435  
1050  
Standard W / Btu/h  
Low  
High  
Standard  
Low  
High  
Standard  
High  
Standard  
W / Btu/h  
Power Input  
(Inverter different Compressor  
speed)  
W
W
W
W
W
A
640  
180  
1050  
640  
16.8  
7.0  
Rated Input  
Rated Current  
A
Turbo  
330  
CFM  
CFM  
CFM  
H
M
L
294  
253  
Air Flow Volume  
218  
CFM  
pints/hour  
W/W  
Dehumidifying Volume  
STD  
1.69  
14.0  
22  
Indoor unit  
Fan Motor  
MW09CIH  
Turbo  
r/min  
r/min  
r/min  
r/min  
W
1260  
1050  
920  
730  
20  
4.0  
0.38  
H
M
L
Speed  
Output  
Capacitor  
RLA  
F
A
Fan  
Type  
Cross flow fan  
3.62 X 25.4  
Aluminum fin-copper tube  
216  
Diameter-Length  
in.  
Evaporator  
Pipe Diameter  
Row-Fin Gap  
in.  
in.  
0.019 - 0.055  
in.  
25.4 X 1 X 10.5  
width (L)  
Model  
Swing  
MP24AA  
Motor  
Output  
W
2.4  
Fuse (A)  
A
PCB 3.15A  
Sound Pressure Level  
H
M
L
H
M
L
dB (A)  
dB (A)  
dB (A)  
dB (A)  
dB (A)  
dB (A)  
34  
30  
26  
44  
40  
36  
Sound Power Level  
33 1/4 X 10 7/8 X 7 1/8  
in.  
in.  
36X10X14  
Net Weight /Gross Weight  
22  
lbs  
8
Specifications  
12K of 115V Models  
Outdoor Unit MR12CH - SYSTEM  
Model  
Function  
COOLING  
Rated Voltage  
Frequency  
(Inverter different Compressor  
speed)  
115  
High  
Standard  
Low  
Hz  
Hz  
Hz  
70  
41  
15  
Total Capacity  
(Inverter different Compressor  
speed)  
W / Btu/h  
High  
4100/14000  
3520/12000  
1320/4500  
1050  
Standard W / Btu/h  
Low  
W / Btu/h  
Power Input  
(Inverter different Compressor  
speed)  
High  
Standard  
Low  
High  
Standard  
High  
W
W
W
W
W
A
640  
180  
1050  
640  
6.5  
3.2  
Rated Input  
Rated Current  
Standard  
A
Turbo  
300  
277  
253  
CFM  
CFM  
CFM  
Air Flow Volume  
H
M
L
CFM  
pints/hour  
W/W  
218  
2.54  
1.2.00  
22  
Dehumidifying Volume  
EER / C.O.P  
SEER/HSPF  
Indoor unit  
Fan Motor  
Turbo  
r/min  
r/min  
r/min  
r/min  
W
1260  
1050  
920  
730  
20  
1.0  
0.2  
H
M
L
Speed  
Output  
Capacitor  
RLA  
F
A
Fan  
Type  
Diameter-Length  
Cross flow fan  
3.62X25.4  
in.  
Evaporator  
Aluminum fin-copper tube  
Pipe Diameter  
Row-Fin Gap  
in.  
in.  
.276  
.077-.055  
in.  
25.4X1X10.5  
width (L)  
Model  
Swing  
Motor  
MP24AA  
Output  
W
2.4  
Fuse (A)  
A
PCB 3.15A  
Sound Pressure Level  
Sound Power Level  
H
M
L
H
M
L
dB (A)  
dB (A)  
dB (A)  
dB (A)  
dB (A)  
dB (A)  
34  
30  
26  
44  
40  
36  
in.  
in.  
lbs  
33 1/4 X 10 7/8 X 7 1/8  
36X10X14  
Net Weight /Gross Weight  
22  
9
Specifications  
Outdoor Unit  
MR09C1H  
SANYO  
Manufacturer/trademark  
Model  
Type  
C-6RZ110H1A  
Twin rotory  
33  
Compressor L.R.A. (A)  
RLA(A)  
A
A
4.59  
Power Input(W)  
Overload Protector  
Throttling Method  
W
800  
Int11l-3979  
Electronic Expansion Valve  
throttling  
Transducer starting  
Starting Method  
Working Temp Range  
F
41 - 115  
Coil  
Aluminum fin-copper tube  
Heat  
Exchanger  
Coil  
Pipe Diameter  
Rows-Fin Gap  
mm  
in.  
.275  
2 - .005  
Coil length (l) xheight (H) xcoil width (L)  
Speed  
23.94 X 20 X 1.73  
rpm  
W
900/650  
Output of Fan Motor  
40  
0.17  
Fan Motor  
RLA  
A
Capacitor  
μF  
/
Air Flow Volume of Outdoor Unit  
1118  
CFM  
Type-Piece  
Axial fan - 1  
Fan  
Diameter  
in.  
15.7  
Defrosting Method  
Climate Type  
/
T1  
I
Isolation  
Moisture Protection  
IP24  
Permissible Excessive Operating  
Pressure for the Discharge Side  
Permissible Excessive Operating  
Pressure for the Suction Side  
Sound Pressure Level  
PSI  
PSI  
552  
175  
dB (A)  
dB (A)  
in.  
53  
63  
Sound Power Level  
Dimension (W×H×D)  
33 3/8 X 23 1/2 X 12 1/2  
Dimension of Package (L×W×H)  
Net Weight /Gross Weight  
in.  
34.6 X 14.2 X 22.3  
79.4/90.4  
R410A  
lbs  
Name of refrigerant  
Refrigerant  
Weight  
2.65  
lbs  
ft  
Factory Prescharge  
25  
.33  
Gas additional charge  
Liquid Pipe Diameter  
Gas Pipe Diameter  
02/H  
mm  
mm  
Connection  
Pipe  
Φ6(1/4”)  
Φ9(3/8”)  
Max. Interunit Height Difference  
Max. Interunit Piping Length  
ft  
ft  
33  
66  
The above data is subject to change without notice. Please refer to the nameplate of the unit.  
10  
Specifications  
Outdoor Unit  
MR12C1H  
SANYO  
Manufacturer/trademark  
Model  
Type  
C-6RZ110H1A  
Twin rotory  
33  
Compressor L.R.A. (A)  
RLA(A)  
A
A
4.59  
Power Input(W)  
Overload Protector  
Throttling Method  
W
800  
Int11l-3979  
Electronic Expansion Valve  
throttling  
Transducer starting  
Starting Method  
Working Temp Range  
F
41 - 115  
Coil  
Aluminum fin-copper tube  
Heat  
Exchanger  
Coil  
Pipe Diameter  
Rows-Fin Gap  
mm  
in.  
.275  
2 - .005  
747X508X44  
900/680  
40  
Coil length (l) xheight (H) xcoil width (L)  
Speed  
mm  
rpm  
W
Output of Fan Motor  
Fan Motor  
RLA  
A
0.17  
Capacitor  
μF  
/
Air Flow Volume of Outdoor Unit  
1118  
CFM  
Type-Piece  
Axial fan  
Fan  
Diameter  
in.  
15.7  
Defrosting Method  
Climate Type  
/
T1  
I
Isolation  
Moisture Protection  
IP24  
Permissible Excessive Operating  
Pressure for the Discharge Side  
Permissible Excessive Operating  
Pressure for the Suction Side  
Sound Pressure Level  
PSI  
PSI  
552  
175  
dB (A)  
dB (A)  
in.  
55  
65  
Sound Power Level  
Dimension (W×H×D)  
33 3/8 X 23 1/2 X 12 1/2  
Dimension of Package (L×W×H)  
Net Weight /Gross Weight  
in.  
34.6 X 14.2 X 22.3  
79.4/90.4  
R410A  
lbs  
Name of refrigerant  
Refrigerant  
Weight  
2.65  
lbs  
ft  
Factory Prescharge  
25  
Gas additional charge  
Connection  
H
1/4 oz per ft  
Φ6(1/4”)  
Φ9(3/8”)  
Pipe  
Liquid Pipe Diameter  
Gas Pipe Diameter  
mm  
mm  
Max. Interunit Height Difference  
Max. Interunit Piping Length  
ft  
ft  
33  
66  
The above data is subject to change without notice. Please refer to the nameplate of the unit.  
11  
Specifications  
Appending date  
Table showing operation frequency limits for cooling and heating  
Outdoor Relative Humidity 40%  
Outdoor Relative Humidity 72%  
140  
140  
130  
120  
110  
100  
130  
120  
110  
100  
Indoor Wet Bulb  
Temperature(  
59°F  
60.8°F  
59°F  
68°F  
77°F  
Indoor Wet Bulb  
Temperature(  
)
)
62.6°F  
80  
60  
80  
60  
40  
20  
40  
20  
15  
35  
55  
75  
95  
15  
35  
55  
75  
95  
Compressor Frequency(Hz)  
Compressor Frequency(Hz)  
Performance date for both cooling and heating  
COOLING:  
Temperature Condition  
(°F)  
Heat exchanger pipe  
temp.  
Outdoor fan Compressor  
Standard  
pressure  
P (MPa)  
mode  
revolution  
Model  
name  
Indoor fan  
mode  
(rps)  
Indoor  
Outdoor  
EVP (°F)C  
OD(°F)  
High  
High  
Turbo  
Turbo  
09K  
12K  
0.8 to 1.1  
0.8 to 1.0  
Rated  
53 to 57 105 to 104  
50 to 54 109 to 113  
80/67  
95/–  
Rated  
HEATING:  
Standard  
pressure  
P (MPa)  
Heat exchanger pipe  
temp.  
Temperature Condition  
(°F)  
Compressor  
revolution  
(rps)  
Model  
name  
09K  
12K  
Indoor fan Outdoor fan  
EVP (°F)  
COD(°C)  
mode  
Turbo  
Turbo  
mode  
High  
High  
Indoor  
Outdoor  
Rated  
Rated  
2.8 to 3.2  
2.8 to 3.2  
2 to 4  
0 to 3  
99 to 100  
108 to 111  
67/60  
47/43  
NOTES :  
(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path  
U bent. (Thermistor themometer)  
(2) Connecting piping condition : 7.6 m  
12  
Specifications  
Expanded capacity data tables for both cooling and heating  
Cooling  
110  
• Conditions  
Indoor: D  
D
B
B
8
8
0
0
.
°
06˚F/WB66.92˚F  
F/WB67°F  
Indoor air flow : TURBO  
Pipe length : 7.6m  
100  
90  
80  
70  
Outdoor temp. (˚F)  
Capacity Variation Ratio According to Pipe Length  
110  
110  
105  
100  
95  
• Conditions  
• Conditions  
Indoor: DB80°F/WB67°F  
Outdoor: DB95°F/WB75°F  
Indoor air flow: TURBO  
Indoor: DB80°F/WB67°F  
105  
100  
95  
Outdoor: DB95°F/WB75°F  
Indoor air flow: TURBO  
90  
Standard pipe length 7.6m  
90  
85  
85  
Maximum pipe length 20m  
Maximum Elevation 7.6m  
.5 3.04 .5  
Total Elevation (m)  
80  
80  
01  
6.07  
.5  
9.0  
05  
10  
15  
20  
25  
30  
Total pipe length (m)  
13  
Specifications  
Operation Characteristic Curve  
Cooling  
9 btu unit  
• Conditions  
25.0  
22.5  
20.0  
17.5  
15.0  
12.5  
10.0  
7.5  
Indoor: DB80°F/WB67°F  
Outdoor: DB95°F/WB75°F  
Indoor air flow : TURBO  
Pipe lengt: 7.6m  
115V  
5.0  
2.5  
0
80  
01  
02  
03  
04  
05  
06  
07  
09  
0
Compressor speed (rps)  
12 btu unit  
Cooling  
• Conditions  
Indoor: DB80°F/WB67°F  
Outdoor: DB95°F/WB75°F  
Indoor air flow : TURBO  
Pipe length: 7.6m  
25.0  
22.5  
20.0  
17.5  
15.0  
12.5  
10.0  
7.5  
115V  
5.0  
2.5  
0
80  
01  
02  
03  
04  
05  
06  
07  
09  
0
Compressor speed (rps)  
14  
Specifications  
2.5 Noise criteria curve tables for both models  
09 btu units  
70  
60  
Indoor side noise when blowing  
40  
Outdoor side noise  
35  
50  
40  
30  
25  
30  
20  
Turbo  
Low  
MiddleH  
igh  
0
20  
40  
60  
80  
100  
Indoor fan motor rotating speed  
Compressor frequency/Hz  
12 btu unit  
70  
60  
Indoor side noise when blowing  
Outdoor side noise  
40  
35  
50  
40  
30  
25  
30  
20  
20  
Turbo  
Low  
MiddleH  
igh  
0
20  
40  
60  
80  
100  
Indoor fan motor rotating speed  
Compressor frequency/Hz  
15  
Constrction views  
3. Construction Views  
3.1 Indoor Unit  
W
D
51/4  
21
63/4  
3.2 Outdoor Unit  
W2  
D4  
H2  
W3  
W4  
D2  
D3  
Indoor Unit (mm)  
System  
Outdoor Unit (mm)  
Cabinet  
Cabinet  
H2  
Additional Dimensions  
Model  
Number  
W
H
D
W2  
30 3/4  
D4  
D2  
W3  
D3  
11  
W4  
09K  
12K  
33 1/4  
10 7/8  
7 1/8  
23 1/2  
10 7/8  
12 1/2  
33 3/8  
21 1/2  
16  
Refrigerant System Diagram  
4. Refrigerant System Diagram  
Cooling Models  
INDOOR UNIT  
OUTDOOR UNIT  
GAS SIDE  
3-WAY VALVE  
Muffler  
Discharge  
HEAT  
EXCHANGE  
(EVAPORATOR)  
Suction  
Accumlator  
COMPRESSOR  
HEAT  
EXCHANGE  
(CONDENSER)  
LIQUID SIDE  
Electric Expansion  
Valve  
2-WAY VALVE  
Strainer  
Strainer  
COOLING  
17  
Schematic Diagram  
5. Schematic Diagram  
5.1 Electrical Date  
Indoor Unit  
Symbol  
Color symbol  
Symbol  
BN  
Color symbol  
BROWN  
WHITE  
WH  
YE  
YELLOW  
BLUE  
BU  
BK  
RED  
BLACK  
RD  
YELLOW GREEN  
PROTECTIVE EARTH  
YEGN  
Outdoor Unit  
L1  
Symbol  
Parts name  
REACROR  
Symbol  
Color symbol  
WHITE  
YELLOW  
RED  
WH  
YE  
PCB1~PCB2  
PRINTED CIRCUIT BOARD  
CONNECTOR  
S10/S11S40/S70/S80/S90  
RD  
SAT  
OVERLOAD  
BN  
SAT OVERLOAD BN BROWN  
BLUE  
COMP  
COMPRESSOR  
BU  
PROTECTIVE EARTH  
BK  
BLACK  
YEGN  
YELLOW GREEN  
5.2 Electrical wiring  
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.  
Indoor Unit  
DISPLAY  
AP1  
ROOM  
TUBE  
TEM.SENSOR  
TEM.SENSOR  
CN1  
CN2  
0
0
RT1  
RT2  
13  
XT1  
W4 BU  
W5 BK  
W3 BN  
N
N(1)  
2
L1  
L1  
DISP-1  
DISP-2  
ROOM  
TUBE  
COM-OUT  
3
CAP  
W2 YEGN  
W1 YEGN  
AC-L  
L-OUT  
AP2  
K4  
JUMP  
ELECTRIC BOX  
EVAPORATOR  
G
G
SWING-UD  
TR_OUT  
TR_IN  
PG  
PGF  
TC  
M2  
M1  
I
II  
SWING MOTOR(U.D)  
TRANSFORMER  
FAN MOTOR  
18  
Schematic Diagram  
Outdoor Unit  
Cooling Models of 115V  
COMP  
COMP  
E
C
R
S
CT1,2  
TUBE  
OUTROOM EXHUAST  
W8 YEGN  
TEM.SENSOR  
TEM.SENSOR  
TEM.SENSOR  
RT5  
L2  
RT3  
RT4  
L2  
L2  
W3YEGN  
W10 RD  
W5 BU  
G
W6 YE W7 BK  
U
W
V
G
OVERHEAT  
OUTROOM EXHAUST  
OUTTUBE  
I
N
D
O
O
R
E
G
XT2  
W15 BU  
N(1)  
2
W4 BK  
COMU  
W14 BN  
AP1  
3
L
N
FILTER  
L4  
L4  
L1  
L1  
W1 BN  
W2 BU  
W17 RD  
W16 WH  
AC-L1  
AC-N1  
1
2
3
4
U
N
I
OFAN  
CN1  
E
W13 YEGN  
AC-N3AC-N4AC-L3 AC-L2  
AC-N5 AC-L2 AC-L4  
T
POWER  
N
W18 YEGN  
W20 BU W23 OG  
W21 BN  
C4  
G
C3  
G
W19 BU  
W24 RD  
1
2
2
1
L
M
EKV  
FAN MOTOR  
W22 WH  
G
19  
Schematic Diagram  
5.3 Printed Circuit Board  
TOP VIEW  
4
1
2
3
6
1
2
3
4
5
6
7
8
9
Interface of neutral wire  
5
Transformer input  
Interface of PG motor  
Auto button  
Feedback from PG motor  
Up&Down swing  
7
12  
Jumper cap  
8
Indoor temperature sensor  
Pipe temperature sensor  
11  
9
10 DISP-1, DISP-2 display interface  
11 Protective tube  
12 Communication interface  
10  
BOTTOM VIEW  
20  
Schematic Diagram  
TOP VIEW  
Terminal of  
jump wire,  
live wire and  
neutral wire,  
AC-N4 joint  
Neutral wire terminal  
of 4-way valve  
AC-N3,  
AC-L2 joint  
AC-L3  
Terminal of jumper  
wire, neutral wire  
External connect high-  
Live wire terminal of 4-way  
valve  
capacity positive terminal  
External connect high-  
capacity negative  
terminal  
Terminal of  
ground wire  
Protective  
tube  
Main relay  
Terminal of DC fan  
Stabilized voltage  
block 7805  
Terminal of  
Terminal of  
communication wire  
Terminal of  
compressor  
overload  
Discharge  
terminal of  
compressor  
Terminal of  
outdoor pipe  
temperature  
Protective  
tube  
High frequency  
transformer  
Slug of on-off  
power  
power lead-in  
wire and  
IPM module  
protector  
neutral wire  
Terminal of power  
lead-in wire and  
live wire  
Outdoor  
ambient  
temperature  
sensor  
BOTTOM VIEW  
21  
Function and Control  
6. Function and Control  
6.1 Remote Control Operations  
1
START / STOP  
P ress to start or stop operation.  
2
3
: P ress to decrease temperature  
setting.  
: P ress to increase temperature  
setting.  
4
5
FAN AUTO  
P ress to set fan speed.  
MODE  
P ress to select operation mode  
(AUTO/COOL/DRY/FAN/HEAT).  
6
SENSOR  
7
8
CLOCK  
Press it set clock.  
1
3
9
2
TIMER ON  
5
4
6
Press it to set auto-on timer.  
9
AIR SWEEP  
Press it set swing angle.  
8
7
10  
EXTEND  
10  
11  
14  
12  
15  
11  
12  
TEMP  
TIMER OFF  
13  
Press it to set auto-o timer  
13  
14  
TURBO  
SLEEP  
Note: Only name different between X-Fan  
15  
LIGHT  
Press it to turn on/o the light.  
and Blow, but th1e7function is the same.  
*Remote control works with cool and Heat Pump Models  
22  
Function and Control  
1
ON/OFF :  
Press this button to start the unit operation .Press this button again to stop the unit operation.  
2 MODE :  
Each time you press this button,a mode is selected in a sequence that goes from AUTO,  
, as the following:  
COOL,DRY, FAN,and HEAT  
*
FAN  
HEAT  
*
AUTO  
COOL  
DRY  
function.  
*Note:Only for modelswith heating  
After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not  
be displayed on the LCD, and the unit will automatically select the suitable operation  
mode in accordance with the room temperature to make indoor room comfortable.  
+ :  
3
4
Press this button to increase set temperature.Holding down button above 2 seconds rapidly  
increases set temperature. In AUTO mode, set temperature is not adjustable.  
Press this button to decrease set temperature.Holding down button above 2 seconds rapidly  
.
decreases set temperature. In AUTO mode, set temperature is not adjustable.  
5 FAN:  
Every press of FAN button changes the fan speed in the following order:  
Auto  
Medium speed  
High speed  
Low speed  
6
:
Everypressof thebutton changes the swing anglein the follow order:  
OFF  
This remote controller is universal . If any command  
the unit will carry out the command as  
,
or  
is sent out,  
indicates the guide louver swings as:  
23  
Function and Control  
TIMER ON:  
7
Press TIMER ON button, "ON" blinks and  
disappears. Within 5 seconds, every press of + or -  
button increases or decreases the ON time setting by 1 minutes. Holding down either buton  
above 2.5 seconds rapidly changes the time setting by 1 minute and then by 10 minutes.  
Within 5 seconds after setting, press TIMER ON to confirm. To cancel the TIMER ON  
operation, press TIMER ON button.  
8
9
TIMER OFF :  
Press TIMER OFF button to set TIMER OFF. The setting method is the same as TIMER  
ON.  
CLOCK :  
Press CLOCK button, the icon blinks. During 5 seconds blinking, pressing + or - button adjusts  
preset time. Holding down either button above 2 seconds increases or decreases the time by  
1 minute every 0.5 second. If you are still pressing the button after 10 minutes increased or  
decreased, the time will be changed by 10 minutes every 0.5 second. During blinking, press  
the CLOCK button again, the icon  
has been finished.  
will be constantly displayed and it indicates that setting  
10  
X-FAN:  
Pressing X-FAN button in COOL or DRY mode,the icon  
is displayed and the indoor  
fan will continue operation for 10 minutes in order to dry the indoor unit even though you  
have turned off the unit.  
After energization, X-FAN OFF is defaulted. X-FAN is not available in AUTO,FAN or  
HEAT mode.  
11 TEMP:  
Press TEMP button,  
(set temperature),  
(indoor ambient temperature) and  
(outdoor ambient temperatur) is displayed circularly. Not displaying icon is defaulted.  
During operation of TEMP button, the set temperature is always displayed.  
Note: Outdoor ambient temperature is only displayed for some models.  
24  
Function and Control  
12 TURBO:  
Press this button in COOL or HEAT mode turns on/off Turbo function. After TURBO  
function is set, its icon is displayed. When switching operation mode or changing  
fan speed, this function will be canceled automatically.  
at super high fan speed. (This function is not applicable for some models).  
13  
SLEEP:  
Press SLEEP button into SLEEP operation. Press SLEEP button again to cancel SLEEP.  
This function only can be used in COOL, HEAT (applicable to heat pump unit) or DRY  
mode, to maintain the most comfortable temperature for you.  
14  
LIGHT:  
If the light is tunrned on ,  
is  
Press LIGHT button turns on/off the display's light.  
displayed. If the light is tunrned off  
disappears.  
4
3
2
and  
About lock  
Press "+ " and "-" buttons simultaneously  
to lock or unlock the keypad. If the remote  
pressing any button, blinks  
controller is locked,  
three times.  
is  
displayed. In this case,  
4
and  
About switch between fahrenheit and cenrigrade  
MODE  
ć
and"- " buttons simultaneously to switch between and  
̧
At unit OFF, press  
"
"
.
25  
Function and Control  
Replacement of Batteries  
1.Remove the battery cover plate from the rear of the remote controller.  
(As shown in the figure)  
2.Take out the old batteries.  
3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.  
4. Replace the battery cover plate.  
Notes:  
ƾ
●
When changing the batteries, do not use old or different batteries,  
otherwise, it may cause malfunction of the wireless remote control.  
If the wireless remote controller will not be used for a long time, please  
remove batteries to prevent damage from leaking batteries.  
The operation should be performed in its receiving range.  
It should be kept 1m away from the TV set or stereo sound sets.  
If the wireless remote controller does not operate normally, please take  
the batteries out and replace them after 30 s. If still not operating properly,  
replace the batteries.  
●
●
●
●
Sketch map for  
replacing batteries  
Emergency Operation  
When the wireless remote controller is lost  
or damaged, please use the manual switch  
on the main unit. Operation will be in AUTO  
mode and the temperature setting or fan  
.
speed can not be changed  
The manual switch can be operated as follow:  
Manual switch  
ƽ
To operate: Pressing the AUTO/STOP button,  
the unit enters into AUTO mode.  
Fig.3  
The microcomputer will monitor the room  
temperature to select the (COOL, HEAT, FAN)  
mode automatically,to abtain the comfortable  
effect.  
ƽ
To turn off: Press the AUTO/STOP button to  
switch the unit off.  
26  
Function and Control  
6.2 Description of Each Control Operation  
1. Temperature Parameters  
)
)
Indoor preset temperature (T  
Indoor ambient temperature (T  
preset  
amb.  
2. Basic Functions  
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory  
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be  
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with  
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room  
temperature;  
(1) Cooling Mode  
Working conditions and process of cooling  
When T .≥ Tprese,t the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor  
amb  
will work and the indoor fan will run at preset speed.  
F
When T .≤ Tpreset-28 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will  
amb  
run at preset speed.  
When Tpreset-28 F<Tamb.< Tpreset+34 F, the unit will remain at its previous state.  
F
F
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61 to 86  
If the compressor is shut down for some reasons, the indoor fan and the swing device will operate at original state.  
Tamb  
Start cooling  
Tpreset  
Original working state  
Stop cooling  
Tpreset -28 F  
3 minutes  
6 minutes  
6 minutes  
Compressor  
Outdoor fan  
Indoor fan  
Preset fan Speed  
Run  
Stop  
Protection  
Antifreeze protection  
Under cooling and dry mode, 6 minutes after the compressor is started:  
If T evap.≤ 36 F, the compressor will operate at reduced frequency.  
If T evap.≤ -30 F is detected for durative 3 minutes, the compressor will stop, and after 30 seconds, the outdoor fan will stop;  
and under cooling mode, the indoor fan and the swing motor will remain at the original state.  
If T evap. ≥ 42 and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original  
F
operation state.  
Total current up and frequency down protection  
If Itotal≤ A, frequency rise will be allowed; if Itotal  
≥
total ≥ C, the compressor will  
B, frequency rise will not be allowed; ifI  
run at reduced frequency; and if Itotal ≥D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.  
(2) Dry Mode  
Working conditions and process of dry  
If Tamb  
.
Tprese,t the unit will enter cooling and dry mode, in which case the compressor and the outdoor fan will  
operate and the indoor fan will run at low speed.  
If Tpreset-28 F Tamb.≤ Tprese,t the compressor remains at its original operation state.  
If Tamb.< Tpreset -28 F , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will  
operate at low speed.  
27  
Function and Control  
Protection  
Protection is the same as that under the cooling mode.  
(3) Heating Mode  
Working conditions and process of heating  
If Tamb.≤Tpreset+36°F, the unit enters heating mode, in which case the fourꢀway valve, the compressor and the outdoor fan  
cold air prevention.  
will operate simultaneously, and the indoor  
fan will run at preset speed in the condition of preset  
If T amb≥. Tpreset+41°F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will stop  
after 60ꢀsecond blow at low speed  
If Tpreset+36°F<T amb<. Tpreset +41°F, the unit will maintain its original operating status.  
Under this mode, the fourꢀway valve is energized and temperature can be set within a range of 61 ꢀ 86°F  
operating symbol, the heating symbol and preset temperature are revealed on the display.  
Condition and process of defrost  
. The  
When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes,  
and one of the following conditions is reached, the unit will enter the defrost mode after 3 minutes.  
a.  
b.  
c.  
d.  
T
≥A°F, Toutdoor tube≤W°F;  
outdoor amb.  
A°F≤Toutdoor amb.<B°F, Toutdoor tube ≤X°F;  
B°F≤Toutdoor amb.<C°F, Toutdoor tube ≤Y°F;  
Touter amb.<C°F, Touter tube ≤Z°F  
At that time, the indoor fan stops and the compressor stops, and after 30 seconds the outdoor fan will stop, and then after 30  
seconds, the fourꢀway valve will stop. After 30 seconds, the  
frequency.  
compressor is initiated for raising the frequency to defrost  
, the compressor will be converted  
≥E°F  
When the compressor has operated under defrost mode for 7.5 minutes, or Touter tube  
. And after another 30 seconds, the fourꢀway valve will be  
to 53Hz operation. After 30 seconds, the compressor will stop  
door fan will run under preset cold air  
and the outdoor fan will be started, the in  
opened, and after 60 seconds, the compressor  
prevention conditions, and H1 will be displayed at temperat  
ure display area on the display panel. Defrost frequency is  
70Hz.  
3.Protection  
Cold air prevention  
The unit is started under heating mode (the compressor is ON):  
In the case of Tindoor amb.<75°F : if T tube ≤104°F and the indoor fan is at stop state, the indoor fan will begin to run at low  
, the indoor fan also will run at low speed; and after  
tube >40  
speed with a time lag of 2 minutes. Within 2 minutes, if T  
1ꢀminute operation at low speed, the indoor fan will be converted to operation at preset speed. Within 1ꢀminute low speed  
operation or 2ꢀminute nonꢀoperation, if T , the fan will run at present speed.  
tube >108°F  
: if Ttube ≤108°F, the indoor fan will run at low speed,and after one minute, the indoor fan  
In the case of T  
≥75°F  
indoor amb.  
, the indoor fan will be converted  
in oneꢀminute low speed operation, if Ttube >108°F  
will be converted to preset speed. With  
to preset speed.  
1
2
Note: Tindoor amb.  
refers to, under initially heating mode, the indoor ambient temperature before the  
command to start the compressor is performed according to theprogram, or after the unit is withdrawn from defrost, the  
indoor ambient temperature before the defrost symbol is cleared.  
Total current up and frequency down protection  
If the total current I  
≥X, frequency rise will not be allowed; if Itotal ≥Y, the  
total ≤W, frequency rise will be allowed; if Itotal  
compressor will run at reduced frequency; and if I  
total ≥Z, the compressor will stop and the outdoor fan will stop with a time  
lag of 30s.  
(4) Fan Mode  
Under the mode, the indoor fan will run at preset speed and the compressor, the outdoor fan, the fourꢀway valve and the  
electric heater will stop.  
Under the mode, temperature can beset within a  
range of 61°F ꢀ 86°F.  
(5) AUTO Mode  
Working conditions and process of AUTO mode  
Under AUTO mode, standard cooling temperature T  
and standard heating temperature T  
preset is 77°F  
preset  
is 64.4°F.  
< T  
a.  
Once energized, if T  
amb.≤68°F  
.< 77°F  
, the unit will run  
amb  
, the unit will be started under heating mode; if 68°F  
.≥77°F, the unit will be started under cooling mode.  
under fan mode and the operation indicator lamp will be bright; and if T  
amb  
28  
Function and Control  
a. Under AUTO mode, if Tamb.≥Tpreset is detected, the unit will select to run under cooling mode, in which case implicit  
preset temperature is 77°F; if Tamb.≤Tpreset 28°F, the compressor will stop, the outdoor fan will stop with a time lag of 1  
minute, and the indoor fan will run at preset speed; and if Tpreset  
state.  
–(28°F)< Tamb.< Tpreset , the unit will remain at its original  
b. Under AUTO mode, if Tam.b≤Tpreset +36°F is detected, the unit will select to run under heating mode, in which case  
, the compressor will stop, the outdoor fan will stop with a time lag  
preset 41°F  
; if Tamb.≥T  
implicit preset temperature is 64°F  
of 1 minute, and the indoor fan will run under the mode of residue heat blowing; and if Tpreset +36°F  
unit will remain at its original state. The cooling-only unit will run under fan mode.  
c. Under AUTO mode, if 68°F< Tamb.< 77°F, the unit will remain at its original state.  
2.Protection  
.< Tpreset +41°F, the  
< Tamb  
a. In cooling operation, protection is the same as that under the cooling mode;  
b. In heating operation, protection is the same as that under the heating mode;  
c. When ambient temperature changes, operation mode will be converted preferentially. Once started, the compressor will  
remain unchanged for at least 6 minutes.  
(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes  
Overload protection  
T
tube : measured temperature of outdoor heat exchanger undercooling mode; and measured temperature of indoor heat  
exchanger under heating mode.  
1) Cooling overload  
a. If Ttube ≤106°F, the unit will return to its original operation state.  
b. If Ttube ≥131°F, frequency rise is not allowed.  
c. If Ttube ≥136°F, the compressor will r unat reduced frequency.  
d. If Ttube ≥144°F, the compressor will stop and the indoor fan will run at preset speed.  
2) Heating overload  
a. If Ttube ≤106°F, the unit will return to its original operation state.  
b. If Ttube ≥131°F, frequency rise is not allowed.  
c. If Ttube ≥136°F, the compressor will run at reduced frequency.  
d. If Ttube≥144°F, the compressor will stop and the indoor fan will blow residue heat and then stop.  
Exhaust temperature protection of compressor  
≥
If exhaust temperature 208°F, frequency is not allowed to rise.  
≥
If exhaust temperature 217°F, the compressor will run at reduced frequency.  
≥
If exhaust temperature 230°F, the compressor will stop.  
≤
If exhaust temperature 194°F and the compressor has stayed at stop for at least 3 minutes, the compressor will resume its  
operation.  
Communication fault  
If the unit fails to receive correct signals for durative 3 minutes, communication fault can be justified and the whole system  
will stop.  
Module protection  
Under module protection mode, the compressor will stop. When the compressor remains at stop for at least 3 minutes, the  
compressor will resume its operation. If module protection occurs six times in succession, the compressor will not be started  
again.  
Overload protection  
, the compressor will stop and the outdoor fan will stop with a  
If temperature sensed by the overload sensor is over 239°F  
, the overload protection will be relieved.  
time lag of 30 seconds. If temperature is below 203°F  
If voltage on the DC bus is below 150V or over 420V, the compressor will stop and the outdoor fan will stop with a time  
lag of 30 seconds. When voltage on the DC bus returns to its normal value and the compressor has stayed at stop for at least  
3 minutes, the compressor will resume its operation.  
Faults of temperature sensors  
29  
Function and Control  
Designation of sensors  
Faults  
The sensor is detected to be open-circuited or short-circuited for successive 30  
seconds  
Indoor ambient temperature  
The sensor is detected to be open-circuited or short-circuited for successive 30  
seconds  
The sensor is detected to be open-circuited or short-circuited for successive 30  
seconds  
The sensor is detected to be open-circuited or short-circuited for successive 30  
seconds, and no detection is performed within 10 minutes after defrost begins.  
After the compressor has operated for 3 minutes, the sensor is detected to be  
open-circuited or short-circuited for successive 30 seconds.  
After the compressor has operated for 3 minutes, the sensor is detected to be  
open-circuited or short-circuited for successive 30 seconds.  
Indoor tube temperature  
Outdoor ambient temperature  
Outdoor tube temperature  
Exhaust  
Overload  
3. Other Controls  
(1) ON/OFF  
Press the remote button ON/OFF: the on-off state will be changed once each time you press the button.  
(2) Mode Selection:  
Press the remote button MODE, then select and show inthe following ways: AUTO, COOL, DRY, FAN, HEAT, AUTO.  
(3) Temperature Setting Option Button  
Each time you press the remote button TEMP+ or TEMP-,the setting temperature will be up or down by 34°F  
Range: 61°F~86°F, the button is useless under the AUTO mode.  
(4) Time Switch  
. Regulating  
You should start and stop the machine according to the setting time by remote controller.  
(5) SLEEP State Control  
a. When the air conditioner is under the mode of COOL, DRY, and the SLEEP mode has been set well, after the SLEEP  
state keeps about 1 hour, the pre-setting T will raise 34°F, and it will raise 34°F again after 2 hours, so it raise 36°F in  
2 hours, then it will run on at the setting temperature and fan speed.  
b. When the air conditioner is under the mode of HEAT, and the Timer has been set well, after theSLEEP state keeps about  
1 hour, the pre-setting T will reduce 34°F, and it will reduce 34°F again after 2 hours, so it reduce 36°F in 2 hours, then  
it will run on at the setting temperature and wind speed.  
c. The setting temperature keeps the same under the FAN mode and AUTO mode.  
(6) Indoor Fan Control  
The Indoor Fan can be set as HIGH, MED, LOW by remote controller, and the Indoor Fan will be respectively run at high,  
medium, low speed. It will also be set as AUTO, and the Indoor Fan is as the following at the automatic fan speed.  
Cooling mode: T ≥ T setting+ 2, high speed; Tsetting- 2 T ring T setting+ 2, medium speed; T ≤ Tsetting– 2, low speed.  
ring  
ring  
Sending fan mode: : T  
T setting+ 4, high speed; Tsetting+2≤T ring ≤ T setting+ 4, medium speed; Tring  
T setting+2, low  
ring  
speed.  
Moisture removal mode: force to be set as the low speed  
Heating mode: Tring≤ Tsetting+ 1 high speed; Tsetting+1 Tring T setting+ 5, medium speed; Tring≥Tsetting+ 2, low speed.  
(7) Buzzer Control  
The buzzer will send a  
sound when the air conditioner ispowered up or received the information sent by the remote  
control or there is a button input, the single tube cooler doesn’t receive the remote control ON signal under the mode of  
heating mode.  
(8) Auto button  
by  
If the controller is on, it will stop by pressing the button, and if the controller is off, it will be automatic running state  
pressing the button, swing on and light on, and the main unit will run based on the remote control if there is remote control  
order.  
(9) Up-and-Down Swinging Control  
When power on, the up-and-down motor will firstly move the air deflector to o counter-clockwise, close the air outlet.  
After starting the machine, if you don’t set the swinging function, heating mode and auto-heating mode, the up-and-down  
air deflector will move to D clockwise; under other modes, the up-and-down air deflector will move to L1. If you set the  
swing function when you start the machine, then the wind blade will swing between L and D. The air deflector has 7  
swing states: Location L, Location A, Location B, Location C, Location D, Location L to Location D, stop at any  
location between L-D (the included angle  
between L~D is the same). The air deflector will be closed at 0 location, and the  
swing is effectual only on condition that setting the swing order and the inner fan is running. The indoor fan and  
compressor may get the power when air deflector ison the default location.  
30  
Function and Control  
Heating angle  
Cooling angle  
(10) Display  
Operation pattern and mode pattern display  
All the display patterns will display for a time when the unit is powered on, the operation indication icon will display in red under  
standby status. When the machine is start by remote controller, the indication icon will light and display the current  
operation mode (the mode light includes: Cooling, heating and dry). If you close the light key, all the display icons  
will close.  
Double-8 display  
According to the different setting of remote control, the nixie lamp may display the current temperature (the temperature  
scope is from 61°F to 86°F) and indoor ambient temperature. The heating and air supply temperature will display 77°F  
under auto-mode, the temperature will display 64 F under the heating mode, and the temperature will display H1 under the  
defrosting mode.(If you set thefahrenheit temperature displa  
temperature)  
y, the nixie lamp will display according to fahrenheit  
(11) Protection function and failure display  
E2: Freeze-proofing protection  
E6: Communication failure  
E4: Exhausting protection  
E8: Overload protection  
E5: Overcurrent protection  
F1: Indoor ambient sensor start and short circuit (continuously measured failure in 30S)  
F2: Indoor evaporator sensor start and shortcircuit (continuously measured failure in 30S)  
F3: Outdoor ambient sensor start and short circuit (continuously measured failure in 30S)  
F2: Outdoor condenser sensor start and short circuit (continuously measured failure in 30S, and don’t measure within 10  
minutes after defrosted)  
F5: Outdoor exhausting sensor start and short circuit (continuously measured failure in 30S after the compressor operated 3  
minutes)  
H3: Overload protection of compressor  
PH: High-voltage protection  
P1: Nominal cooling and heating  
P3: Medium cooling and heating  
(12) Drying Function  
H5: Module protection  
PL: Low-voltage protection  
P2: Maximum cooling and heating  
P0: Minimum cooling and heating  
You may start or stop the dry function under the modes of cooling and dry at the starting status (The modes of  
automatism, heating and air supply do not have dry function). When you start the dry function, after stop the  
machine by pressing the switch button, you should keep running the infoor fans for 10 minutes under low air damper (The  
swing will operate as the former status within 10 minutes, and other load is stopped), then stop the entire machine; When  
you stop the dry function, press the switch button will stop the machine directly.  
When you start the drying function, operating the drying button will stop the inner fans and close the guide louver.  
(13) Memory function wheninterrupting the power supply  
Memory content: mode, swing function, light, set temperature and wind speed.  
After interrupted the power supply, the machine will start when recovering the power according to the memory content  
automatically. If the last remote control command has not set the timed function, the system will remember the last remote  
control command and operate according it. If the last remote control command has set timed function and the power supply  
is interrupted before the timed time, the system will remember the timed function of the last remote control command, the  
timed time will recounted form power on. If the last remote control command has set timed function, the time is out and the  
system is start or stop according to the set time when the power supply is interrupted, the system will remember the  
operation status before the power supply was interrupted, and do not carry out timed action; The timed clock will not be  
remembered.  
31  
Function and Control  
6.3 Detection of temperature sensor malfunction  
Detect malfunctions of temperature sensor any time.  
In defrosting period, the temperature sensor malfunction will not be detected. 5 min after finishing defrosting, the system begins to  
detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected.  
1. When short-circuit occurs to the temperature sensor for 30s:  
The temperature sensor overheats. In this case, the complete unit will stop for protection. At the same time, the temperature protection  
and temperature sensor malfunction will be shown.  
2. When break-circuit occurs to the temperature sensor for 30s:  
The unit will stop and the temperature sensor malfunction will be displayed  
6.4 Frequency Control  
<Outline>  
When starting the compressor, or when conditions are varied due to the change of the room, the frequency must be initialized according  
to the D value of the indoor unit and the Q value of the indoor unit.  
Q value: Indoor unit output determined from indoor unit volume, air flow rate and other factors.  
1. Pcontrol  
Calculate  
D value in each sampling time (20 seconds), and adjust the frequency according to its difference from the frequency  
previously calculated.  
2. Icontrol  
If the operating frequency is not change more than a certain fixed time, adjust the frequency up and down according to the  
obtaining the fixed D value.  
D value,  
When the D value is small...lower the frequency.  
When the D value is large...increase the frequency.  
3. Frequency management when other controls are functioning  
When frequency is drooping;  
Frequency management is carried out only when the frequency droops.  
For limiting lower limit  
Frequency management is carried out only when the frequency rises.  
4. Upper and lower limit of frequency by PI control  
The frequency upper and lower limits are set depending on indoor unit.  
When low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit, the  
upper limit frequency must be lowered than the usual setting.  
6.5 3-minutes Standby  
Prohibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)  
6.6 Compressor Protection Function  
When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when  
defrosting.)  
Frequency  
FCG 3  
FCG 2  
FCG 1  
TCG1  
TCG2  
TCG3  
88  
64  
FCG3  
FCG2  
FCG1  
48  
240  
360  
180  
Time  
TCG 1sec  
TCG 2sec TCG 3sec  
32  
Function and Control  
6.7 Discharge Pipe Control  
Outline  
The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a  
certain level, the operating frequency upper limit is set to keep this temperature from going up further.  
Detail  
Divide the Zone  
Stop zone  
Drooping zone  
Keep zone  
Up zone  
Heat exchanger  
Reset zone  
thermistor  
temperature  
Management within the Zones  
Zone  
Control contents  
Stop zone  
When the temperature reaches the stop zone, stop the compressor and  
correct abnormality.  
Drooping zone  
Keep zone  
Start the timer, and the frequency will be drooping.  
Keep the upper limit of frequency.  
Return / Reset zone  
Cancel the upper limit of frequency.  
6.8 Input Current Control  
Outline  
Detect an input current by the CT during the compressor is running, and set the frequency upper  
limit from such input current.  
In case of heat pump model, this control is the upper limit control function of the frequency which  
takes priority of the lower limit of four way valve activating compensation.  
Detail  
The frequency control will be made within the following zones.  
2 Hz drooping  
1.0second after  
rushing in the  
drooping zone  
After 2.5 seconds  
Compressor stops  
Stop zone  
1
2
3
Drooping zone  
Keep zone  
Reset zone  
When a “stop current” continues for 2.5 seconds after rushing on the stop zone, the compressor operation stops.  
If a “drooping current” is continues for 1.0 second after rushing on the drooping zone, the frequency will be 2 Hz drooping.  
Repeating the above drooping continues until the current rushes on the drooping zone without change.  
In the keep zone, the frequency limit will remain.  
In the return / reset zone, the frequency limit will be cancelled.  
Limitation of current drooping and stop value according to the outdoor air temperature  
1. In case the operation mode is cooling  
* The current droops when outdoor air temperature becomes higher than a certain level (model by model).  
2. In case the operation mode is heating  
* The current droops when outdoor air temperature becomes higher than a certain level (model by model).  
6.9 Freeze-up Protection Control  
Outline  
33  
Function and Control  
During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent  
freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings.)  
Detail  
Conditions for Start Controlling  
Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start.  
Control in Each Zone  
Heat exchanger  
thermistor temperature  
A
Return/Reset zone  
Up zone  
B
C
Keep zone  
Drooping zone  
D
E
Stop zone  
34  
Function and Control  
PI control  
Frequency  
0Hz  
60sec.  
50sec.  
600sec.  
50sec.  
ON  
Compressor  
OFF  
ON  
Four way valve  
OFF  
5sec.  
5sec.  
ON  
Fan  
OFF  
450pps  
350pps  
450pps  
Electronic expansion  
valve opening  
Initial opening  
6.12 Fan Control  
Outline  
Fan control is carried out according to the following priority.  
1. Fan ON control for electric component cooling fan  
2. Fan control when defrosting  
3. Fan OFF delay when stopped  
4. ON/OFF control in cooling operation  
5. Tap control when drooping function is working  
6. Fan control in forced operation  
7. Fan control in indoor/outdoor unit silent operation  
8. Fan control in powerful mode  
9. Fan control in normal operation  
Detail  
Fan OFF Control when Stopped  
* Fan OFF delay for 60 seconds must be made when the compressor is stopped.  
Tap Control in indoor/outdoor unit silent operation  
1. When Cooling Operation  
When the outdoor air temperature is lower than 99°F, the fan tap must be set to L.  
2. When Heating Operation  
When the outdoor air temperature is higher than 39°F, the fan tap must be turned to L (only for heat pump model).  
35  
Installation Manual  
7. Installation Manual  
7.1 Notices for installation  
Important Notices  
The unit installation work must be done by qualified personnel according to the local  
rules and this manual.  
Before installating, please contact with local authorized maintenance center, if unit is  
not installed by the authorized maintenance center, the malfunction may not solved,  
due to discommodious contacts.  
When removing the unit to the other place, please firstly contact with the authorized  
Maintenance Center in the local area.  
The appliance must be positioned so that the plug is accessible  
After pull out the power plug then make the appliance operation again，to avoid the  
icing of outdoor unit damage axial flow fan，should electrify the appliance but not  
operation for 4 hours for warm-up purpose(only for Heat Pump models).  
Basic Requirements For Installation Position  
Install in the following place may cause malfunction. If it is unavoidable contact with  
service center please:  
Place where strong heat sources, vapors, flammable gas or volatile object are emitted.  
Place where high-frequency waves are generated by radio equipment, welders and  
medical equipment.  
Place where a lot of salinities such as coast exists.  
Place where the oil (machine oil) is contained in the air.  
Place where a sulfured gas such as the hot spring zones is generated.  
Other place with special circumstance.  
Indoor Unit Installation Position Selection  
The air inlet and outlet vent should be far from the obstruction, make sure that the air  
can be blown through the whole room.  
Select a position where the condensing water can be easily drained out, and the place  
is easily connected for outdoor unit.  
Select a location where the children can not reach.  
Can select the place where is strong enough to withstand the full weight and vibration o  
f
the unit. And will not increase the noise.  
Be sure to leave enough space to allow access for routine maintenance. The height of the  
installed location should be 8ft or more from the floor.  
Select a place about 1m or more away from TVset or any other electric appliances.  
Select a place where the filter can be easily taken out.  
Make sure that the indoor unit installation should accord with installation dimension  
diagram requirements.  
Do not use the unit in the immediate surroundings of a laundry a bath a shower or a  
swimming pool.  
36  
Installation Manual  
Outdoor Unit Installation Position Selection  
Select a location from which noise and outflow air emitted by unit will not inconvenience  
neighbors, animals, plants.  
Select a location where there should be sufficient ventilation.  
Select a location where there should be no obstructions cover the inlet and outlet vent .  
The location should be able to withstand the full weight and vibration of the outdoor unit  
and permit safe installation.  
Select a dry place, but do not expose under the direct sunlight or strong wind.  
Make sure that the outdoor unit installation dimension should accord with installation  
dimension diagram, convenient for maintenance, repair.  
The height difference of connecting the tubing within 16ft, the length of connecting the  
tubing within 32ft.  
Select a place where it is out of reach for the children.  
Select a place where will not block the passage and do not influence the city appearance.  
Safety Requirements For Electric Appliances  
1. The power supply should be used the rated voltage and AC exclusive circuit,  
the power cable diameter should be satisfied.  
2. Don't drag the power cable emphatically.  
3. It should be reliably earthed, and it should be connected to the special earth device,  
the installation work should be operated by the professional.  
The air switch must have the functions of magnetic tripping and heat tripping, in order  
to protect the short circuit and overloading.  
4. The min. distance from the unit and combustive surface is 5ft.  
5. The appliance shall be installed in accordance with national wiring regulations.  
6. An all-pole disconnection switch having a contact separation of at least 3mm in all poles  
should be connected in fixed wiring.  
Make sure that the Live wire or Zero line as well as the ground wire in the family power  
socket can not be wrong connected, there should be reliable and no short circuit in the  
diagram.  
wrong connection may cause fire.  
Ground requirements  
1. Air conditioner is type I electric appliance, thus please do conduct reliable earthing  
measure.  
2. The yellow-green two-color wire in air conditioner is earthing wire and cannot be used  
for other propose. It cannot be cut off and be fix it by screw, otherwise it would cause  
electric shock.  
3. The earth resistance should accord to the National Criterion.  
4. The user power must offer the reliable grounding terminal. Please don't connect the  
earthing wire with the following place:  
Tap water pipe.  
Gas pipe.  
Contamination pipe.  
Other places that professional personnel consider them unreliable.  
5. The model and rating values for fuses according the silk print on fuse cover or related  
PCB board.  
37  
Installation Manual  
7.2 Installation dimension diagram  
Space to the ceiling  
6 in.  
side  
above  
Space to the wall  
6 in. to side  
6 in. to side  
Space to the wall  
6 ft.  
from  
bottom  
Air outlet side  
Space to the floor  
The dimensions of the space necessary for correct  
installation of the appliance including the minimum  
permissible distances to adjacent structures  
Space to the obstruction  
Air inlet side  
12 in. side  
Space to the wall  
12 in. side  
Space to the wall  
Air outlet side  
38  
Installation Manual  
Installing Mounting Plate  
1.Make the mounting plate completely level . As the water tray's oulet of the indoor unit is two-way type, the  
indoor unit during installation should slightly slant to watert tray's outlet for smooth drainage of condensing  
water.  
2.Fix the mounting plate on the wall with screws.(Where is pre-covered with plastic granula)  
3.Be sure that the mounting plate has been fixed firmly enough to withstand the weight of an adult of 60kg;  
further more, the weight should be evenly shared by each screw.  
Wall  
Wall  
Mark on the middle of it  
Gradienter  
Space  
to the  
wall  
Space  
to the  
wall  
6 in  
6 in  
above  
above  
Right  
Left  
2.5 in  
2.5 in  
Fig.5  
(Rear piping hole)  
(Rear piping hole)  
Boring Piping Hole  
Indoor  
Wall pipe  
Outdoor  
1.Make the piping hole (2.5 in) in the wall at a slight downward slant to the  
outdoor side.  
Seal pad  
2.Insert the piping-hole sleeve into the hole to prevent the connection piping  
and wiring from being damaged when passing through the hole.  
55  
Ø
Installing Drain Hose  
1.For proper draining, the drain hose should be placed at a downward slant.  
2.Do not wrench or bend the drain hose or flood its end by water.  
Wrenched  
Bent  
3.The long drain hose passing through indoor areas should  
be wrapped with insulation material.  
Flooded  
Connecting Indoor and Outdoor Electric Wires  
1.Open the front panel.  
2.Remove the wiring cover as shown in Fig 6.  
(only for heat pump unit) through the hole in the  
3.Make the power connection cord and signal control wire
the back of indoor unit.  
4.Reinstall the clamp and wiring cover.  
5.Recovert he front panel.  
Fig.6  
39  
Installation Manual  
NOTE:  
All interconnecting wiring between indoor and outdoor unit must be performed by a  
a licenced electrical contractor  
The electric wiring must be correctly connected.Improper connection may cause spare parts  
malfunction.  
Tighten the terminal screws adequately to prevent loosening.  
After tightening the screws, slightly pull the wire and confirm whether it is firm or not.  
Ensure the electrical connections are properly earthed to prevent electrical shocks.  
Ensure all wiring connections are secure and the cover plates are reinstalled properly.Poor  
installations that allow dust or moisture incursion may cause fire or electrocution.  
Installing Indoor Unit  
External connection  
electric wire  
Gas side pipe  
The piping can be output from right, right rear, left  
or left rear.  
Liquid side piping  
When routing the piping and wiring from the left  
or right side of indoor unit, cut off the tailings  
from the chassis as necessary(As shown in Fig.7)  
Cut off the tailings 1 when routing the wiring only;  
Tailing 2  
Tailing 1  
Gas side piping  
insulation  
Liquid side  
Piping insulation  
Finally wrap it  
with tape  
Fig.7  
Water drainage pipe  
Cut off the tailings 1 and tailings 2 when routing  
both the wiring and piping.  
Take out the piping from body case, wrap the piping,  
power cords, drain hose with the tape and make them  
through the piping hole. (As shown in Fig.8)  
Hang the mounting slots of the indoor unit on the  
upper hooks of the mounting plate and check if it is  
firm enough.(As shown in Fig.9)  
Left  
Left rear  
Right  
Fig.8  
Right rear  
Fixing hook  
Mounting  
plate  
Mounting  
plate  
The height of the installed location should be  
or more from the floor.  
6ft  
Fig.9  
Installing Connection Pipe  
Align the center of the piping flare with the relevant valve.  
Screw in the flare nut by hand and then tighten the  
nut with spanner and torque wrench referring to the  
following:  
Indoor unit piping  
Taper nut  
Piping  
Hex nut diameter  
Tightening torque (lb ft)  
11 ~ 14.7  
22.8 ~ 25.8  
36.9 ~ 40.6  
Spanner  
Torque  
wrench  
44.3 ~ 47.9  
51.6 ~ 55.3  
NOTE: Firstly connect the connection pipe to indoor unit, then to outdoor unit; pay attention  
pipe; ensure the joint nut is adequately  
to the piping bending, do not damage the connection  
tightened, otherwise it may cause leakage.  
40  
Installation Manual  
7.4 Installing Outdoor Unit  
Electric wiring  
Disassemble the cable cross plate sub-assy on the outdoor unit  
right side plate.  
Take off wire clamp. Connect and fix power connect  
cord (for cooling and heating unit,connect and fix power  
connect cord and signal control wire)to terminal of line  
bank. Wiring should fit that of indoor unit.  
Cable Cross Plate sub-assy  
For 115V Uints  
Fix the power connection cable with wire clamp,  
(for cooling and heating unit, use the wire clamp  
to fix the power connection cable and the signal  
control wire), then connect the corresponding  
connector.  
Power  
For 208~230V Uints  
Ensure wire has been fixed well.  
Install the cable cross plate sub-assy.  
Power  
NOTE:  
Wrong wiring may cause spare parts malfunction.  
*Note: Terminal 2 is the communication connection  
After the cable fixed, make sure there should be a free space between the connection  
and connection and fixing place on the lead wire.  
Air purging and leakage test  
1. Connect charging hose of manifold valve to charge end of low pressure  
valve (both high/low pressure valves must be tightly shut).  
2. Connect joint of charging hose to vacuum pump.  
Liquid pipe  
3. Fully open handle handle of Lo manifold valve.  
4. Open the vacuum pump to evacuate. At the beginning, slightly  
Vacuum  
gauge  
Gas pipe  
Valve  
cap  
loosen joint nut of low pressure valve to check if there  
is air coming inside. (If noise of vacuum pump has  
been changed, the reading of multimeter is 0) Then  
tighten the nut.  
Vacuum pump  
5. Keep evacuating for more than 15mins and make  
5
sure the reading of multi-meter is  
Fig.  
6. Fully open high/low pressure valves.  
7. Remove charging hose from charging end of low pressure valve.  
8. Tighten bonnet of low-pressure valve. (As shown in Fig.10)  
Condensate drainage of outdoor unit (not for cooling only)  
The condensate and defrosting water formd during heating  
in the outdoor unit can be properly discharged by drainage  
pipe .  
Installation method:set the drain connection in 25 hole of the  
Ø
chassis has been installed and then connect drainage pipe  
with drain nozzle,so that condensate and defrosting water can  
be properly discharged  
Chassis  
Drain  
connection  
41  
Installation Manual  
7.5 Check after Installation and Operation Test  
Check after Installation  
Items to be checked  
Possible malfunction  
Has it been fixed firmly?  
The unit may drop, shake or emit noise.  
It may cause insufficient cooling(heating)  
capacity  
Have you done the refrigerant leakage test?  
Is heat insulation sufficient?  
It may cause condensation and dripping.  
It may cause condensation and dripping.  
Is water drainage satisfactory?  
Is the voltage in accordance with the rated  
voltage marked on the nameplate?  
It may cause electric malfunction  
or damage the product.  
Is the electric wiring and piping  
connection installed correctly and securely?  
Has the unit been connected to a secure  
ground connection?  
It may cause electric malfunction  
or damage the part.  
It may cause electrical leakage.  
It may cause electric malfunction  
or damage the part.  
Is the power cord specified?  
Are the inlet and outlet openings blocked?  
It may cause insufficient cooling(heating)  
capacity.  
Is the length of connection pipes  
The refrigerant capacity is not accurate.  
and refrigerant capacity been recorded?  
Operation Test  
Before Operation Test  
Do not switch on power before installation is finished completely.  
Electric wiring must be connected correctly and securely.  
Cut-off valves of the connection pipes should be opened.  
All the impurities such as scraps and thrums must be cleared from the unit.  
Operation Test Method  
Switch on power and press "ON/OFF" button on the wireless remote controller to start  
the operation.  
Press MODE button to select the COOL, HEAT (Cooling only unit is not available),  
FAN to check whether the operation is normal or not.  
42  
Installation Manual  
7.6 Installation and Maintenance of Healthy Filter(Optional)  
Installation of Healthy Filter  
Lift up the front panel from the two ends  
of it, as the arrow direction shown. Then  
1.  
(as shown Fig.a)  
pull the air filter out.  
Fig. a  
Fig. b  
2.  
Attach the healthy filter onto the air filter,  
(as shown in Fig.b).  
Air filter  
.
Healthy  
filter  
3. Mount the air filter properly along the arrow  
direction in Fig.c, and then close the panel cover.  
Fig. c  
Cleaning and Maintenance  
Remove the healthy filter before cleaning and re-install it after clean  
according to the installation instruction, but can't with brush or hard  
things. After washing, be sure to shake off remaining water and dry  
in the shade.  
Service Life  
The healthy filter commonly has its usage life time for one year under  
normal condition. As for silver ion filter, it is invalid when its surface  
becomes black (green).  
ƽ
This supplementary instruction is provided for reference to the unit with  
healthy filter. If the graphics provided herein is different from the physical  
goods, the latter one shall prevail. The quantity of healthy filters shall be  
based on the actual delivery.  
43  
Troubleshooting  
9. Troubleshooting  
9.1 Precautions before Performing Inspection or Repair  
Be cautious during installation and maintenance. Do operation following the regulations to avoid electric shock and casualty or even death  
due to drop from high altitude.  
* Static maintenance is the maintenance during de-energization of the air conditioner.  
For static maintenance, make sure that the unit is de-energized and the plug is disconnected.  
* Dynamic maintenance is the maintenance during energization of the unit.  
Before dynamic maintenance, check the electricity and ensure that there is ground wire on the site. Check if there is electricity on the  
housing and connection copper pipe of the air conditioner with voltage tester. After ensure insulation place and the safety, the mainte-  
nance can be performed.  
Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.  
At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position.  
Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing  
written on the wiring diagrams attached to the indoor/outdoor units.)  
Precautions when inspecting the control section of the outdoor  
unit:  
No. Troubleshooting procedure  
A large-capacity electrolytic capacitor is used in the outdoor unit controller  
1
2
3
Confirmation  
(inverter).Therefore,if the power supply is turned off,charge(charging volt-  
age DC280V to 380V)remains and discharging takes a lot of time.. After  
turning off the power source,if touching the charging section before  
discharging, an electrical shock may be caused.  
Judgement by Flashing LED of Indoor/Outdoor Unit  
How to Check simplythe main part  
Please open the outdoor unit after the unit is power off for 20min.  
9.2 Confirmation  
(1)Confirmation of Power Supply  
Confirm that the power breaker operates(ON) normally;  
(2)Confirmation of Power Voltage  
Confirm that power voltage is AC 220-240± 10%.  
115 ± 10%.  
If power voltage is not in this range, the unit may not operate normally.  
9.3 Judgement by Flashing LED of Indoor/Outdoor Unit  
*Trouble shooting is for cooling and Heat Pump models.  
44  
Troubleshooting  
The breaker trips at once when it is set to  
"ON".  
Measure insulation resistance to grou  
if there is any leakage.  
nd to see  
Trip of breaker or blow  
of fuse  
The circuit or the part of the air conditioner has  
malfunction. They heat and break the insulation  
and lead to short circuit or creepage. Measure  
the insulation resistance or eliminate the malfunc-  
tion one by one. If the breaker itself has  
The breaker trips in few  
minutes  
when it is set to "ON"  
malfunction, then replace the breaker.  
No power  
Check power supply circuit.  
Power plug is not well plugged in and poor  
connection  
Check if the plug is properly plugged in  
and make the loose contact firm.  
The air conditioner  
does not react after  
it is powered ( after  
the plug is inserted,  
the buzzer does  
not sound and the  
remote startup has  
no response)  
Fuse of controller burnt out  
Change controller fuse  
Fasten the wiring; measure the output  
voltage of the transformer, if it is  
incorrect, change the transformer  
The transformer connection is loose or has  
bad contact or the transformer has  
malfunction  
Controller is broken  
Check remote controller  
Change batteries  
Remote controller is short of power  
Remote controller malfunction  
Receiver loose or poor connection  
The remote contro-  
ller signals (after it is  
powered, the buzzer  
will sound, unless it  
has malfunction)  
First, press the manual switch button  
AUTO,if there is no response,check  
based on the above methods. If it runs  
normally after pressing the button,check  
again whether the installation position  
and the connection wire of the reception  
head is correct. If it is correct,then repla-  
ce the receiver or the remote controller.  
Receiver is broken  
Power voltage is too low  
Check the voltage. If it is lower than 10% of the rated  
voltage, check the cause, improve the power supply  
condition and add the stabilized voltage power supply.  
45  
Troubleshooting  
Improper set of temperature  
Adjust set temperature  
If cooling (heating) load is  
proper  
Check the forecasted load of cooling (heating)  
heck and fill the leakage, then  
The refrigerant has leakage or is  
vacuumize it and supplement the re-  
frigerant as required  
insufficient  
Leakage between the high pres-  
sure and the low pressure in-  
side the compressor  
Replace the compressor  
Malfunction of  
refrigerant  
flow  
Malfunction of four-way valve  
Replace the four-way valve  
Replace the capillary  
Local block of capillary  
Judge whether the system is blocked by  
observing the condensation of evapora-  
tor and the pressure value of the high  
pressure manometer and take measures  
to deal with the system.  
Blockage of cooling system  
Heat insulation for the connection  
pipes of the indoor unit and the out-  
door unit is bad.  
Make sure that heat insulation for the thick and thin pipes  
is good. Heat insulation must also be provided for the  
joint andthe exposed part of the copper pipe .  
Block of outdoor heat ex-  
Clean the dust accumulated on the surface of  
the heat exchanger.  
changer  
Clean the filter  
Air filter were blocked  
To set the fan speed to high or  
middle speed  
Fan speed was set too slow  
Air circulation  
is insufficient  
Replace the capaci-  
tor  
Capacitor  
damage  
Fan rotation speed becomes  
low  
Motor damage  
Replace the motor  
The installation position of the  
outdoor unit is not appropriate.  
Good ventilation must be provided for the  
installation position of the outdoor unit.  
Properly install the rainproof plate or the sunproof plate. If the  
maximum cool air still can not meet the requirement, it is sug-  
gested to replace the air conditioner.  
The outdoor temperature is too high.  
The air tightness is not enough. People  
come in and out too frequently. There  
are heating devices indoors.  
Keep certain air tightness indoors, try not to use  
electricalappliance with large quantity of heat  
46  
Troubleshooting  
The indoor fan motor is burned or bre-  
aks or has the heat protector malfun-  
ction.  
Replace the fan motor or the defective part.  
Replace the fan motor  
The built-in heat protector of the motor  
breaks frequently because the motor is  
abnormal.  
The fan does not  
run when it is set  
to supply air.  
Make the correction connection based on the circuit  
drawing.  
Wrong connection  
The fan capacitor has open circuit or  
is damaged  
Replace the fan capacitor of the same type and same  
specification.  
The outdoor fan motor is damaged.  
Wrong connection  
Replace the fan motor  
In the cooling and  
heating mode, the  
compressor runs,  
but the outdoor  
Make the correct connection based on the circuit  
drawing.  
fan does not run.  
Replace the fan capacitor  
Replace the compressor  
The outdoor fan capacitor is damaged.  
Malfunction of compressor  
Breakage of running capacitor of  
compressor  
When cooling or  
heating, outdoor  
fanruns,compr-  
essor  
Replace the capacitor  
The voltage is too low or too high.  
Wrong wire connection  
Manostat is recommended.  
Connect the circuit diagram correctly  
doesn't run.  
Use the multimeter to check whether the contact of  
the compressor is on when it is not overheated. If it  
is not on, then replace the protector  
The protector itself has malfunction.  
The refrigerant is not enough or is too  
much.  
Adjust the volume of the refrigerant  
Replace the capillary  
The capillary is blocked and the temp-  
erature rises.  
The compressor is  
too hot and leads to  
the action of the  
protector.  
The compressor does not run smoothly  
or is stuck. The air discharge valve is  
damaged  
Replace the compressor  
Replace the protector  
The protector itself has malfunction.  
The torque of the swing motor is not  
enough  
The swing fan  
does not run.  
First, check whether the connection is wrong. If no,  
replace the parts  
wrong connection  
e
The controller is damag d IC2003 is  
, the swing relay can not close,  
damaged  
etc  
47  
Troubleshooting  
Controller malfunction (IC20-  
03 broken, creepage of parallel  
capacitor of relay loop,relay is bro-  
ken etc.)  
Change controller  
In cool, heat mode,  
the outdoor unit and  
compressor will not  
run.  
Correctly wire according to the drawing  
Adjust setting temp.  
Wire loose or wrong connection  
Improper setting of temperature  
Drainage pipe blocked or broken  
Change drainage pipe  
Water leakage  
Wrap of refrigerant pipe joint is not close  
enough.  
Re-wrap and make it tight.  
Fan of indoor unit contacts other parts.  
Adjust fan location.  
Take out the foreign object.  
Foreign object in indoor unit  
Adjust support washer of compressor, and  
tighten loosen screws.  
Compressor shakes too much.  
Separate the touching pipeline.  
Touch of pipeline of outdoor unit  
Touch of inner plates  
Abnormal sound  
and shake  
1. Tighten connect screw.  
2. Stick absorbing clay between plates.  
Louver of outdoor unit touched outer  
case.  
Adjust location of louver.  
Change compressor  
Abnormal sound inside compressor  
48  
Troubleshooting  
If malfunction occurs,corresponding code will display and the unit will resume normal until protection or  
malfunction disappears.  
Yellow indicator blinks for once  
Compressor stars (normal)  
Defrosting (normal display of indoor unit)  
Yellow indicator blinks for twice  
Yellow indicator blinks for 3 times  
Anti-freezing protection (normal  
display of indoor unit)  
IPM protection  
Yellow indicator blinks for 4 times  
Overcurrent protection  
Overload protection  
Yellow indicator blinks for 5 times  
Yellow indicator blinks for 6 times  
Exhaust protection  
Yellow indicator blinks for 7 times  
Yellow indicator blinks for 8 times  
Red indicator blinks for once  
Overlod protection of compresoor  
Indicatordisplay  
of outdoor unit  
Cooling (dehumidify) or heating current  
dropped frequency current.  
r
Exhaust temp. dropped frequency temp.  
Red indicator blinks for twice  
Red indicator blinksfor 3 times  
Tube  
temp. dropped frequency temp.  
Red indicator blinks for 4 times  
Red indicator blinks for 5 times  
T
tube-in dropped frequency temp.  
Outdoor condenser temp. sensor mal.  
Outdoor ambient temp. sensor mal.  
Red indicator for 6 times  
Outdoor exhaust temp. sensor mal.  
Starting at temp. does not reach  
Red indicator blinks for 7 times  
Red indicator blinks for 8 times  
Green indicator does not blink  
Communication is abnormal  
49  
Troubleshooting  
Name of running status  
Yellow light  
Red light  
Green light  
Indoor unit display  
1
2
3
4
5
6
7
8
9
Compressor start  
Blink once  
Defrosting  
Blink twice  
H1  
E2  
H5  
E5  
H4  
E4  
H3  
Anti-freezing protection  
IPM protection  
Blink three times  
Blink four times  
Blink five times  
Blink six times  
Blink seven times  
Blink eight times  
Overcurrent protection  
Overload protection  
Air exhaust protection  
Overload protection  
Limited frequency (current)  
Blink once  
10 Limited frequency (Air exhaust)  
Blink twice  
11 Limited frequency (overload)  
Blink three times  
Blink four times  
Blink five times  
Blink six times  
Blink seven times  
12 Limited frequency (anti-freezing)  
13 Outdoor unit ambient sensor malfunction  
14 Outdoor unit tube temp. sensor malfunction  
15 Outdoor air exhaust sensor malfunction  
F3  
F4  
F5  
16 Achieve the temperature of unitstartsup  
Blink eight times  
17 Communication is normal  
Blink continuously  
OFF  
18 Communication malfunction  
19 Overload sensor malfunction  
20 Low voltage protection  
E6  
H3  
PL  
PH  
F1  
F2  
P1  
P2  
P3  
P0  
Blink nine times  
Blink twelve times  
Blink thirteen times  
21 High voltage protection  
22 Indoor ambient sensor malfunction  
23 Indoor tube temperature sensormalfunction  
24 Normal cooling or norminal heating  
25 Max. cooling or max. heating  
26 Interim cooling or interim heating  
27 Min. cooling or Min. heating  
YELLOW-LED4  
GREEN-LED2  
RED-LED3  
50  
Troubleshooting  
Analysis or processing of some of the malfunction display:  
1. Compressor discharge protection  
Possible reasons: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser;  
the system has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage  
inside four-way valve causes incorrect operation; malfunction of compressor; malfunction of protection relay;  
malfunction of discharge sensor; outdoor temperature too high.  
Processing method: refer to the malfunction analysis in the above section.  
2. Low voltage over current protection  
Possible reason: Sudden drop of supply voltage.  
3. Communication malfunction  
Processing method:Check if communication signal cable is connected reliably.  
4. Sensor openo rs hort circuit  
Processing method: Check whether sensor is normal, connected with the corresponding position on the  
controller and if damage lf lead wire is found.  
5. Compressor overload protection  
Possible reasons: insufficient or too much refrigrant; blockage of capillary and increase of suction temp.;  
improper running of compressor, burning in or stuck of bearing, damage of discharge valve;  
malfunctioning of protector.  
Processing method: adjust refrigerant amount; replace the capillary; replace the compressor; use  
universal meter to check if the contactor of compressor is fine when it is not overheated, if not replace  
the protector.  
6. System malfunction  
i.e.overload protection.When tube temperature (Check the temperature of outdoor heat exchanger  
when cooling and check the temperature of indoor heat exchanger when heating) is too high,  
protection will be activated.  
Possible reasons: Outdoor temperature is too high when cooling; insufficient outdoor air circulation;  
refrigerant flow malfunction.  
please refer to the malfunction analysis in the previous section for handling method .  
7. IPM module protection  
Processing method:Once the module malfunction happens,if it persists for a long time and can not be self- canceled,  
cut off the power and turn off the unit,and then re-energize the unit again after about 10 min. After repeating the  
procedure for sever times, if the malfunction still exists, replace the module.  
51  
Troubleshooting  
9.4 Howto Check simply the main part  
Main Check Points:  
Units of 115V: Use AC voltmeter to check wether the voltage between terminal L and N on the wiring board is 115V AC  
Units of 115V: Whether the reactor (L) is correctly connected? Whether the connection is loose or fallen? Whether the reactor  
(L) is damaged ?  
Fault diagnosis process:  
Switch on the unit  
and wait 1 minute  
Use DC voltmeter  
to measure the  
voltage on the two  
ends of electrolytic  
capacitor (test3)  
Voltage higher than 103.5V?  
For 115V Units  
Voltage higher than 187V?  
For 208~230V Units  
Fault with the  
voltage testing  
circuit on contr-  
ol panel AP1  
Replace the  
control panel  
AP1  
Y
N
Measure the AC voltage between  
terminal L and N on wiring board  
XT  
Switch off the  
power and repair  
the supply power  
to restore the volt-  
age to 103.5~126.5  
VVAC For 115V  
Units  
Re-energize  
and switch  
on the unit  
Voltage within 103.5~126.5V?  
For 115V Units  
If the fault is  
eliminated?  
N
Y
Y
Switch off the power and wait 20 minutes;  
or use DC voltmeter to measure the volt-  
age on the use DC voltmeter to measure  
the voltage on the two ends of capacitor  
(test3), until the voltage is lower than 20V  
N
Check the  
connection of reactor  
(L in the Electrical  
Wiring Diagram)  
Connect the rea-  
Re-energize  
and switch on  
the unit  
ctor L according to  
Electrical Wiring  
Diagram  
If the fault  
is eliminated?  
If the wiring of  
reactor L is normal?  
N
Y
Y
Replace the control  
panel AP1  
N
End  
52  
Troubleshooting  
Mainly detect:  
Whether the connection between control panel AP1 and compressor COMP is secure? Whether loose? Whether the connection  
is in correct order?  
Whether the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage  
between terminal L and N on the wiring board XT)  
Whether the compressor coil resistance is normal? Whether the insulation of compressor coil against the copper tube  
is in good condition?  
Whether the working loads of the machine are too high? Whether the radiation is good?  
Whether the charge volume of refrigerant is correct?  
53  
Troubleshooting  
Fault diagnosis process:  
Energize and  
switch on  
Use AC voltmeter  
to measure the  
voltage between  
terminal L and N  
on the wiring  
If the voltage  
Check the supply  
voltage and  
restore it to  
IPM protection  
between terminal L  
and N on wiring  
board XT is within  
210VAC~250VAC?  
occurs after the  
machine has run for  
a period of time?  
Y
N
210VAC~250VAC  
board XT)  
Y
Start and run the  
unit. Before  
Voltage between  
the two ends of  
electrolytic  
capacitor (test3) is  
higher than 250V  
protection occurs,  
use DC voltmeter to  
measure the voltage  
between the two  
ends of electrolytic  
capacitor on control  
panel AP1 (test3)  
If the unit can  
work  
Y
Y
N
Y
normally?  
Please confirm:  
1. If the indoor and  
outdoor heat  
N
Reconnect the  
exchangers are  
dirty? If they are  
obstructed by other  
objects which affect  
the heat exchange  
of indoor and  
Stop the unit and  
disconnect the power  
supply. Then, check  
the connection of  
capacitor C2  
according to Electrical  
Wiring Diagram.  
capacitor C2 according  
to Electrical Wiring  
Diagram. Then,  
energize and start the  
unit.  
The connection  
of capacitor C2  
is loose.  
outdoor unit.  
2. If the indoor and  
outdoor fans are  
working normally?  
3. If the environment  
temperature is too  
high, resulting in  
that the system  
pressure is too high  
and exceeds the  
permissible range?  
4. If the charge  
volume of  
N
Remove the wires  
on the two ends of  
capacitor C2. Then,  
Stop the unit and  
disconnect the power  
supply. Wait 20 minutes,  
or use DC voltmeter to  
measure the voltage  
If the unit can  
work  
normally?  
use  
capacitance  
N
Y
meter to measure  
the capacitor C2.  
Verify as per the  
Parameters Sheet.  
between the two ends of  
capacitor C2, until the  
voltage is lower than 20V  
refrigerant is too  
much, resulting in  
that the system  
pressure is too  
If the unit can  
work  
Replace the capacitor  
C2. Then, energize  
and start the unit.  
If capacitor  
C2 is failed?  
Y
Y
high?  
normally?  
5. Other conditions  
resulting in that the  
system pressure  
becomes too high.  
Replace the  
control panel AP1  
N
N
Refer to the  
Electrical Wiring  
Diagram and check  
if the connection  
between AP1 and  
COMP is loose and if  
the connection order  
is correct.  
Take corrective actions  
according to Technical  
Service Manual, and  
then energize and start  
the unit.  
If there is any  
abnormality  
described above?  
If the unit can  
work  
normally?  
Y
Y
Replace the  
control panel AP1  
N
N
Connect the control panel  
AP1 and compressor  
COMP correctly according  
to the Electrical Wiring  
Diagram. Then, energize  
and start the unit.  
If the connection  
between AP1 and  
COMP is unsecure  
or the connection  
order is wrong?  
Y
If the unit can  
work  
normally?  
Y
Use ohmmeter to  
measure the resistance  
between the three  
terminals on compressor  
COMP, and compare the  
measurements with the  
compressor resistance on  
Service Manual.  
If the  
Replace the  
compressor  
COMP  
resistance is  
N
normal?  
N
Use ohmmeter to  
measure the resistance  
between the two  
Resistance higher  
than 500MΩ?  
terminals of compressor  
COMP and copper tube.  
N
Replace the  
control panel  
AP1  
END  
54  
55  
Troubleshooting  
Mainly detect:  
Is outdoor ambient temperature in normal range?  
Are the outdoor and indoor fans operating normally?  
Is the heat dissipation environment inside and outside the unit is good?  
Overheat and high  
temperature protection  
Normal protection, please operate it after the  
outdoor ambient temperature is normalized.  
Is outdoor ambient temperature higher than 53?  
Y
N
20 minutes after the complete  
unit is powered off.  
Improve the heat  
dissipation environment  
of the unit  
Is heat dissipation of the indoor unit  
and outdoor unit abnormal?  
Y
N
1. Check if the fan terminal O FAN  
is connected correctly  
2. Resistance between any two  
terminals is measure by an ohm  
gauge and should be less than 1K  
Ohm.  
N
Does the outdoor fan work normally?  
Y
Replace the fan  
capacitor C1  
Replace the control panel  
AP1  
Replace the  
outdoor fan  
End  
56  
Troubleshooting  
Mainly detect:  
Whether the compressor wiring is connected correct?  
Is time for compressor stopping enough?  
Is compressor broken?  
Power on the unit  
Is stop time of the compressor  
longer than 3 minutes?  
N
Restart it up after 3 minutes  
Y
Does startup fail?  
Y
Connect the wires as per the  
connection diagram  
Are the wires for the compressor connected  
correctly? Is connection sequence right?  
N
Y
Replace the control panel AP1  
N
If the fault is eliminated?  
N
Replace the  
compressor  
Y
End  
57  
Troubleshooting  
Mainly detect:  
Whether the unit voltage is too high?  
Whether the work voltage is too low?  
Out of step occurs in  
operation  
Out of step occurs once the  
unit is powered on.  
Check if the fan terminal  
O FAN is connected correctly  
Is stop time of the  
compressor longer than  
3 minutes?  
Replace the fan  
capacitor C1  
Is the outdoor fan working  
normally?  
Replace the  
outdoor fan  
Is the outdoor unit blocked  
by foreign objects?  
Remove foreign objects  
Are the wires for the compressor connected  
correctly? Is connection sequence right?  
Is the connection made in clockwise  
direction?  
Replace the  
control panel AP1  
Connect the  
wires correctly  
Replace the control  
panel AP1  
If the fault is eliminated?  
If the fault is eliminated?  
Replace the  
compressor  
Replace the  
compressor  
End  
End  
58  
Troubleshooting  
Mainly detect:  
Whether the electronic expansion valve is connected well or not? Is electronic expansion valve damaged?  
Is refrigerant leaked?  
20 minutes after the  
complete unit is  
powered off  
Is the terminal FA for the  
electronic expansion valve  
connected correctly?  
Connect the  
wires correctly  
Resistances between the first four pins  
close to the terminal hole and the fifth  
pin are almost the same, less than 100  
ohm.  
Replace the electronic  
expansion valve  
If the fault is eliminated?  
Replace the  
control panel  
AP1  
If the fault is eliminated?  
Coolant leakage, refilling  
the coolant  
End  
59  
Troubleshooting  
Mainly detect:  
Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken  
The failure diagnosis process is as follows:  
Start  
Check wiring of the  
reactor (L) of the  
outdoor unit and the  
PFC capacitor  
Replace it as per the  
Whether there is any  
wiring diagram and  
Y
If the fault is eliminated?  
damage or  
reconnect the wires  
short-circuit?  
N
Remove the PFC capacitor  
and measure resistance  
between the two terminals.  
N
The capacitor is  
short circuited and  
the capacitor  
should be repla-  
ced  
Restart the unit  
If the fault is eliminated?  
Y
Y
Is the resistance around zero?  
N
Disconnect the terminals for the  
reactor and measure the resistance  
between the two terminals of the  
reactor by an ohm gauge  
N
Replace the reactor  
If the fault is eliminated?  
Y
Whether there is any damage  
or short-circuit?  
Restart the unit  
Y
N
Replace the control  
panel AP1  
N
Y
End  
60  
Troubleshooting  
Mainly detect:  
Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect  
well or not, if is there any damage?  
Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?  
The flow chart for malfunction detect:  
Start  
Did the equipment operate  
N
normally before the failure  
Y
occurs?  
Check the wiring of the indoor and  
outdoor units with reference to the  
wiring diagram  
Check wiring inside of  
the indoor and outdoor  
units  
Y
Is the connection right?  
N
N
Correctly connect the  
corresponding wires for  
the indoor and outdoor  
units with reference to  
the wiring diagram  
The AP1 voltage  
detection circuit  
is at fault  
Are wires broken?  
Y
N
Check the communication  
circuit of the outdoor unit  
If the fault is eliminated?  
N
If the fault is eliminated?  
Replace the main board  
˄AP1˅of the outdoor unit  
The communication  
circuit is abnormal  
Y
N
If the fault is eliminated?  
N
Replace the main board  
of the indoor unit  
Y
Y
Y
End  
61  
Troubleshooting  
Start  
Measure voltage at the  
Test 10 position as  
shown in the diagram  
with a voltmeter  
Value jumping  
N
Y
Measure voltage at the  
Test 15 position as  
shown in the diagram  
with a voltmeter  
Y
Value jumping  
N
Y
Fault with  
outdoor unit  
End  
Measure voltage at the  
Test 11 position as  
shown in the diagram  
with a voltmeter  
Value jumping  
N
Y
Measure voltage at the  
Test 12 position as  
shown in the diagram  
with a voltmeter  
N
Value jumping  
Y
The communication  
circuit of the outdoor  
unit is normal  
62  
Troubleshooting  
(9) Flow chart for outdoor communitcation circuit detecting:  
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63  
Troubleshooting  
Troubleshooting Guide  
Appendix 1: form for indoor/outdoor unit's ambient sensor numerical value of resistance  
Temp.  
Resistan  
ce  
Temp.  
Resistance  
Temp.  
(°F)  
Resistance  
Temp.  
(°F)  
Resistance  
(°F)  
(°F)  
-2  
0
1
3
5
7
9
68  
70  
72  
73  
75  
77  
79  
81  
82  
84  
86  
88  
90  
91  
93  
95  
138  
140  
142  
144  
145  
147  
149  
151  
153  
154  
156  
158  
160  
162  
163  
165  
167  
169  
171  
172  
174  
176  
178  
180  
181  
183  
185  
187  
189  
190  
192  
194  
196  
198  
199  
202  
203  
205  
207  
208  
210  
212  
214  
216  
217  
219  
221  
223  
225  
226  
228  
230  
232  
234  
235  
237  
239  
241  
243  
244  
246  
248  
250  
252  
253  
255  
257  
259  
261  
262  
264  
266  
268  
270  
271  
273  
275  
277  
10  
12  
14  
16  
18  
19  
21  
23  
25  
27  
28  
30  
32  
34  
36  
37  
39  
41  
43  
45  
46  
48  
50  
52  
54  
55  
57  
59  
61  
63  
64  
66  
97  
99  
100  
102  
104  
106  
108  
109  
111  
113  
115  
117  
118  
120  
122  
124  
126  
127  
130  
131  
133  
135  
136  
64  
Troubleshooting  
Troubleshooting Guide  
Appendix 2: form for indoor/outdoor unit's tube temperature sensor numerical value of resistance  
Temp.  
Resistance  
Temp.  
(°F)  
Resistance  
Temp.  
(°F)  
Resistance  
Temp.  
(°F)  
Resistance  
(°F)  
-2  
0
1
3
5
7
9
68  
70  
72  
73  
75  
77  
79  
81  
82  
84  
86  
88  
90  
91  
93  
95  
138  
140  
142  
144  
145  
147  
149  
151  
153  
154  
156  
158  
160  
162  
163  
165  
167  
169  
171  
172  
174  
176  
178  
180  
181  
183  
185  
187  
189  
190  
192  
194  
196  
198  
199  
202  
203  
205  
207  
208  
210  
212  
214  
216  
217  
219  
221  
223  
225  
226  
228  
230  
232  
234  
235  
237  
239  
241  
243  
244  
246  
248  
250  
252  
253  
255  
257  
259  
261  
262  
264  
266  
268  
270  
271  
273  
275  
277  
10  
12  
14  
16  
18  
19  
21  
23  
25  
27  
28  
30  
32  
34  
36  
37  
39  
41  
43  
45  
46  
48  
50  
52  
54  
55  
57  
59  
61  
63  
64  
66  
97  
99  
100  
102  
104  
106  
108  
109  
111  
113  
115  
117  
118  
120  
122  
124  
126  
127  
130  
131  
133  
135  
136  
65  
Troubleshooting  
Troubleshooting Guide  
Appendix 3: form for indoor/outdoor unit's air exhaust temperature sensor numerical value of resistance  
Temp.  
Resistance  
Temp.  
Resistance  
Temp.  
Resistance  
Temp.  
Resistance  
(°F)  
(°F)  
(°F)  
(°F)  
-2  
0
1
3
5
7
9
68  
70  
72  
73  
75  
77  
79  
81  
82  
84  
86  
88  
90  
91  
93  
95  
138  
140  
142  
144  
145  
147  
149  
151  
153  
154  
156  
158  
160  
162  
163  
165  
167  
169  
171  
172  
174  
176  
178  
180  
181  
183  
185  
187  
189  
190  
192  
194  
196  
198  
199  
202  
203  
205  
207  
208  
210  
212  
214  
216  
217  
219  
221  
223  
225  
226  
228  
230  
232  
234  
235  
237  
239  
241  
243  
244  
246  
248  
250  
252  
253  
255  
257  
259  
261  
262  
264  
266  
268  
270  
271  
273  
275  
277  
10  
12  
14  
16  
18  
19  
21  
23  
25  
27  
28  
30  
32  
34  
36  
37  
39  
41  
43  
45  
46  
48  
50  
52  
54  
55  
57  
59  
61  
63  
64  
66  
97  
99  
100  
102  
104  
106  
108  
109  
111  
113  
115  
117  
118  
120  
122  
124  
126  
127  
130  
131  
133  
135  
136  
66  
Troubleshooting  
9.5 2-way, 3-way Valve Appearance  
2-way Valve (Liquid Side)  
3-way Valve (Gas Side)  
Valve cap  
Hexagonal wrench (4mm)  
Open position  
Closed position  
Flare nut  
Flare nut  
Open position  
Pin  
Closed position  
To  
piping  
connection  
To  
piping  
connection  
Service  
port cap  
Service  
port  
To outdoor unit  
To outdoor unit  
Works  
Shaft position  
Shaft position  
Service port  
Closed  
Closed  
Closed  
Shipping  
(with valve cap)  
(with valve cap)  
(with cap)  
Closed  
Air purging  
Closed  
Open  
(with vacumm pump)  
1.  
(clockwise)  
(Installation)  
(clockwise)  
Open  
Open  
Closed  
Operation  
(with valve cap)  
(with valve cap)  
(with cap)  
Closed  
Open  
Open  
Pumping down  
(Transfering)  
(clockwise)  
(counter-clockwise) (connected manifold  
gauge)  
2.  
3.  
4.  
Open  
Open  
Open  
Open  
Evacuation  
(Servicing)  
(with charging  
cylinder)  
Open  
Open  
Gas charging  
(Servicing)  
(with charging  
cylinder)  
Open  
Pressure check  
(Servicing)  
(with charging cylinder)  
Open  
Open  
Open  
Open  
5.  
6.  
Open  
Gas releasing  
(Servicing)  
(with charging cylinder)  
67  
Troubleshooting  
Liquid side  
Indoor unit  
Outdoor unit  
Clsed  
2-way  
valve  
Gas side  
Clsed  
3-way  
valve  
Vacuum pump  
Lo  
OPEN  
CLOSE  
* Procedure  
CAUTION:  
(1)Connect the charge hose from the manifold valve to the ser-  
vice port of the gas side packed valve.  
If gas leakage are discovered in step 5 above, take the  
following mesures :  
(2)Connect the charge hose to the port of the vacuum pump.  
If the gas leaks stop when the piping connections are  
tightened further, continue working from step 6. If the  
gas leaks do not stop when the connections are  
retightened, repair the location of the leak, discharge  
all of the gas through the service port, and then recharge  
with the specified amount of gas from a gas cylinder.  
(3) Open fully the low pressure side handle of the gauge mani-  
fold valve.  
(4)Operate the vacuum pump to begin evacuating. Perform  
evacuating for about 15 minutes if the piping length is 20 meters  
(15 minutes for 20 meters) (assuming a pump capacity of 27  
liters per minute). Confirm that the compound pressure gauge  
reading is –101 kPa (–76 cmHg).  
(5)Close the low pressure valve handle of gauge manifold.  
– Check the flare connections for gas leakage.  
(6)Use torque wrench to tighten the service port nut to a torque  
of 1.8kg.cm.  
(7)Set the 3-way valve to the back seat.  
(8)Mount the valve stem nuts to the 2-way and 3-way valves.  
(9)Check for gas leakage.  
– At this time, especially check for gas leakage from the 2-way  
and 3-way valve’s stem nuts, and from the service port nut.  
68  
Troubleshooting  
Liquid side  
2-Way  
valve  
Indoor unit  
Outdoor unit  
Open  
Gas side  
Closed  
3-Way  
valve  
Lo  
CLOSE  
CLOSE  
Purge the air  
• Procedure  
(7) Immediately set the 3-way valve to the closed position.  
– Do this quickly so that the gauge ends up indicating 3 to 5kg/  
cm2g.  
(1) Confirm that both the 2-way and 3-way valves are set to  
the open position.  
– Remove the valve stem caps and confirm that the valve stems  
are in the raised position.  
– Be sure to use a hexagonal wrench to operate the valve stems.  
(8) Disconnect the charge set, and mount the 2-way and 3-  
way valve’s stem nuts and the service port nut.  
– Use torque wrench to tighten the service port nut to a torque of  
1.8 kg.m.  
(2) Operate the unit for 10 to 15 minutes.  
– Be sure to check for gas leakage.  
(3) Stop operation and wait for 3 minutes, then connect the  
charge set to the service port of the 3-way valve.  
– Connect the charge hose with the push pin to the service port.  
(4) Air purging of the charge hose.  
– Open the low-pressure valve on the charge set slightly to air  
purge from the charge hose.  
(5) Set the 2-way valve to the closed position.  
(6) Operate the air conditioner at the cooling cycle and stop it  
when the gauge indicates 1kg/cm2g.  
69  
Troubleshooting  
Liquid side  
3-Way  
valve  
Indoor unit  
Closed  
Outdoor unit  
Gas side  
Closed  
3-Way  
valve  
Gas cylinder  
Lo  
R410A  
OPEN  
CLOSE  
• Procedure  
(6) Disconnect the charge set and the gas cylinder, and set  
the Liquid side and Gas side valves to the open position.  
– Be sure to use a hexagonal wrench to operate the valve stems.  
(1) Confirm that both the liquid side valve and the gas side  
valve are set to the closed position.  
(2) Connect the charge set and a gas cylinder to the service  
port of the Gas side valve.  
(8) Mount the valve stem nuts and the service port nut.  
– Use torque wrench to tighten the service port nut to a torque of  
1.8 kg.m.  
– Leave the valve on the gas cylinder closed.  
– Be sure to check for gas leakage.  
(3) Air purging.  
– Open the valves on the gas cylinder and the charge set. Purge  
the air by loosening the flare nut on the liquid side valve ap-  
proximately 45o or 3 seconds then closing it for 1 minute;repeat  
3 times.  
CAUTION: Do not leak the gas in the air during Air Purging.  
– After purging the air, use a torque wrench to tighten the flare  
nut on liquid side valve.  
(4) Check for gas leakage.  
– Check the flare connections for gas leakage.  
(5) Discharge the refrigerant.  
– Close the valve on the gas cylinder and discharge the refriger-  
ant until the gauge indicates 3 to 5 kg/cm2g.  
70  
Troubleshooting  
Balance Refrigerant of the 3-way Valve  
(Gas leakage)  
Liquid side  
Indoor unit  
Outdoor unit  
3-Way  
valve  
Open  
Gas side  
3-Way  
valve  
Open  
Lo  
OPEN  
CLOSE  
• Procedure  
(1) Confirm that both the 2-way and 3-way valves  
are set to the back seat.  
(3) Open the valve (Lo side) on the charge set and  
discharge the refrigerant until the gauge indi-  
cates 0 kg/cm2G.  
(2) Connect the charge set to the 3-way valve’s  
port.  
– If there is no air in the refrigerant cycle (the  
pressure when the air conditioner is not running  
is higher than 1 kg/cm2G), discharge the refrig-  
erant until the gauge indicates 0.5 to 1  
kg/cm2G. if this is the case, it will not be neces-  
sary to apply a evacuatin.  
– Leave the valve on the charge set closed.  
– Connect the charge hose to the service port.  
– Discharge the refrigerant gradually; if it is dis-  
charged too suddenly, the refrigeration oil will  
also be discharged.  
71  
Troubleshooting  
Evacuation  
(All amount of refrigerant leaked)  
Liquid side  
Indoor unit  
Outdoor unit  
3-Way  
valve  
Open  
Gas side  
3-Way  
valve  
Open  
Vacuum pump  
Lo  
OPEN  
CLOSE  
• Procedure  
(1) Connect the vacuum pump to the center hose  
of charge set center hose  
(3) Close the valve (Lo side) on the charge set,  
turn off the vacuum pump, and confirm that  
the gauge needle does not move (approxima-  
tely 5 minutes after turning off the vacuum  
pump).  
(2) Evacuation for approximately one hour.  
– Confirm that the gauge needle has moved  
toward -76 cmHg (vacuum of 4 mmHg or less).  
(4) Disconnect the charge hose from the vacuum  
pump.  
– Vacuum pump oil.  
If the vacuum pump oil becomes dirty or  
depleted, replenish as needed.  
72  
Troubleshooting  
Gas Charging  
(After Evacuation)  
Liquid side  
3-Way  
valve  
Indoor unit  
Outdoor unit  
Open  
Gas side  
Open  
3-Way  
valve  
Check valve  
Charging  
cylinder  
Lo  
(1)  
OPEN  
CLOSE  
• Procedure  
\
This is different from previous procedures.  
(1) Connect the charge hose to the charging  
cylinder.  
Because you are charging with liquid refrigerant  
from the gas side, absolutely do not attempt to  
charge with larger amounts of liquid refrigerant  
while operating the air conditioner.  
– Connect the charge hose which you dis-con-  
nected from the vacuum pump to the valve at  
the bottom of the cylinder.  
– If you are using a gas cylinder, also use a  
scale and reverse the cylinder so that the sys-  
tem can be charged with liquid.  
(4) Immediately disconnect the charge hose from  
the 3-way valve’s service port.  
(2) Purge the air from the charge hose.  
– Open the valve at the bottom of the cylinder  
and press the check valve on the charge set to  
purge the air. (Be careful of the liquid refriger-  
ant). The procedure is the same if using a gas  
cylinder.  
– Stopping partway will allow the gas to be dis-  
charged.  
– If the system has been charged with liquid  
refrigerant while operating the air conditioner  
turn off the air conditioner before disconnecting  
the hose.  
(3) Open the valve (Lo side on the charge set and  
charge the system with liquid refrigerant.  
– If the system can not be charged with the spec-  
ified amount of refrigerant, it can be charged  
with a little at a time (approximately 150g each  
time) while operating the air conditioner in the  
cooling cycle; however, one time is not suffi-  
cient, wait approximately 1 minute and then  
repeat the procedure (pumping down-pin).  
(5) Mount the valve stem nuts and the service  
port nut.  
– Use torque wrench to tighten the service port  
nut to a torque of 1.8 kg.m.  
– Be sure to check for gas leakage.  
73  
Removal Procedure  
10. Removal Procedure  
10.1 Removal Procedure of Indoor Unit  
Warning  
Be sure to wait 10 minutes or more after turning  
off all power supplies before disassembling work.  
Image shown here is indicative only. Actual product  
you receive may differ.  
front panel  
1. Remove front panel  
Open the front panel and slightly pull it to remove it.  
filter  
2. Remove guide louver  
Push out the shaft sleeve and slightly bend the  
guide louver to remove it.  
guide louver  
3. Remove electirc box cover  
Unscrew the screw fixing the electric box cover to  
remove it.  
screw  
74  
Removal Procedure  
temp. sensor  
clasps  
4. Remove front case  
Unscrew the 6 tapping screws fixng the front panel  
and turn the front case backward to remove it.  
screws  
clasps  
5. Remove electric box  
screw  
Unscrew the 2 screws fixing the electric box  
Pull out the wiring terminal of motor and then un-  
screw the 3 screws fixing electric box.Lift the ele-  
ctric box to remove it.  
6. Remove evaporator  
Unscrew the screws on the rear pipe cardplate  
and then remove the cardplate.  
screw  
clasp  
75  
Removal Procedure  
screws  
7. Remove motor and cross flow fan  
Unscrew the screws fixing the motor press plate  
of motor and then the screws connecting the mo-  
tor and cross flow fan to separate and remove  
them.  
screws  
screw  
76  
Removal Procedure  
10.2 Removal Procedure of Outdoor Unit  
Cable Cross Plate sub-assy  
1. Remove top cover and the Cable Cross Plate sub-  
assy Unscrew the screw on the handle and pull the  
Cable Cross Plate sub-assy forcibly downwards to re-  
move it. Unscrew the 3 screws fixing the top cover to  
remove it.  
top cover  
screws  
screws  
cabinet  
2. Remove cabinet  
Unscrew the 4 screws fixing the cabinet to remove it.  
3. Remove front panel  
front panel  
screws  
Unscrew the 5 screws fixing the front panel and  
pull out the front panel to remove it.  
(If it's 108-230V, there are 6 screws need to be unscrewed  
because there are one more power transformer.)  
77  
Removal Procedure  
4. Remove electric box cover  
Unscrew the 2 screws fixing the electiric box. Pull  
theelectric box upwards and unplug the plug-in  
line to remove the electric box.  
screws  
5. Remove axial flow fan  
Unscrew the nut and remove the washer fixing the  
axial flow fan and then pull it out.  
nut and washer  
axial flow fan  
6.Remove 4-way valve  
Wrap the 4-way valve with wet cloth and unsolder  
the 4 weld spots of the 4-way valve to remove it.  
4-way valve  
weld spots  
78  
Removal Procedure  
7. Remove electronic expannsion valve  
Unsolder the weld spots of eletronic expansion  
valve connecting with other pipelines to remove it.  
electronic expannsion valve  
8. Remove gas valve and liquid valve  
Unscrew the 2 screws fixing the gas valve and  
unsolder the weld spots of gas valve and suction  
pipe to remove the gas valve.  
liquid valve  
screws  
Unscrew the 2 screws fixing the liquid valve and  
unsolder the weld spots of liquid valve and suc-  
tion pipe to remove the liquid valve.  
gas valve  
9 . Remove compressor  
Unsolder the 2 weld spots of the compressor and  
unscrew the 3 feet nuts and remove the was-  
heres fixing the compressor to remove it.  
compressor foot  
79  
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED  
SYSTEM COMPONENTS  
MW09C1H / MW12C1H Exploded Diagram  
80  
MW09C1H Parts List  
NO.  
1
2
FPN  
Part Description  
69700100 Filter Sub-Assy  
69700101 Front Case Sub-Assy  
69700102 Front Case  
3
4
5
6
69700103 Evaporator Assy  
69700104 Evaporator Support  
69700105 Guide Louver  
7
8
69700106 Axile Bush (guide louver)  
69700107 Rear Grill  
9
69700108 Helicoid tongue  
69700109 Air Louver 2  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
69700110 Air Louver 1  
69700111 Left Axile Bush  
69700112 Bearing cushion rubber base  
69700113 O-Gasket sub-assy of Bearing  
69700114 Cross Flow Fan  
69700115 Water Tray Glue Plug  
69700116 Wall Mounting Frame  
69700117 MotorPressPlate  
69700118 Pipe Clamp  
69700119 Drainage Pipe  
69700120 Cable Cross Plate  
69700121 Rear Case assy  
69700122 Fan Motor  
69700123 Motor MP24AA  
69700124 Crank  
69700125 Display Board  
69700126 Ambient Temperature Sensor  
69700127 Transformer  
69700128 Electric Box Assy  
69700129 Electric Box  
69700130 4-bit Terminal Board  
69700131 Main Board  
69700132 Jumping Connector  
69700133 Tube Sensor (20K black)  
69700134 Electric Box Cover1  
69700135 Shield cover of Electric Box sub-assy  
69700136 Remote Control  
69700137 Electric Box Cover2  
69700138 Screw Cover  
69700139 Front panel D1  
69700140 Front Panel Sub-Assy  
81  
MW12C1H Parts List  
NO.  
1
2
FPN  
Part Description  
69700100 Filter Sub-Assy  
69700141 Front Case Sub-Assy  
69700142 Front Case  
3
4
5
6
69700103 Evaporator Assy  
69700104 Evaporator Support  
69700105 Guide Louver  
7
69700106 Axile Bush (guide louver)  
9
69700108 Helicoid tongue  
69700109 Air Louver 2  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
69700110 Air Louver 1  
69700111 Left Axile Bush  
69700112 Bearing cushion rubber base  
69700113 O-Gasket sub-assy of Bearing  
69700114 Cross Flow Fan  
69700115 Water Tray Glue Plug  
69700116 Wall Mounting Frame  
69700117 MotorPressPlate  
69700118 Pipe Clamp  
69700119 Drainage Pipe  
69700120 Cable Cross Plate  
69700121 Rear Case assy  
69700122 Fan Motor  
69700123 Motor MP24AA  
69700124 Crank  
69700125 Display Board  
69700126 Ambient Temperature Sensor  
69700127 Transformer  
69700143 Electric Box Assy  
69700129 Electric Box  
69700130 4-bit Terminal Board  
69700131 Main Board  
69700144 Jumping Connector  
69700133 Tube Sensor (20K black)  
69700134 Electric Box Cover1  
69700135 Shield cover of Electric Box sub-assy  
69700145 Remote Controller  
69700137 Electric Box Cover2  
69700138 Screw Cover  
69700139 Front panel D1  
69700140 Front Panel Sub-Assy  
82  
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED  
SYSTEM COMPONENTS  
MR09C1H Exploded Diagram  
83  
MR09C1H Parts List  
NO.  
1
2
FPN  
Part Description  
69700000 Mesh Enclosure  
69700001 Cabinet  
3
69700002 Axial-flow Fan  
4
5
6
69700003 Motor FW30G-ZL  
69700004 Reactor Support Assy  
69700005 Choke Plug  
7
8
9
69700006 Compressor Gasket  
69700007 Compressor C-6RZ110H1A  
69700008 Electric Expansion Valve Sub-Assy  
69700009 Cut-off Valve (1/4)  
69700010 Cut-off Valve (3/8)  
69700011 Valve Support  
69700012 Cable Cross Plate Assy  
69700013 Right Side Plate Assy  
69700014 Wire cover  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
69700015 Magnet Coil  
69700016 Temperature Sensor for Discharge Gas  
69700017 Tube Sensor (20K black)  
69700018 Discharge Tube  
69700019 Inhalation Tube  
69700020 Overload Protector  
69700021 Sensor  
69700022 Rear Grill  
69700023 Condenser Assy  
69700024 Clapboard Sub-Assy  
69700025 Top Cover Plate  
69700026 Motor suport spot welding sub-assy  
69700027 Electric box cover sub-assy  
69700028 Main Board  
69700029 Electric Box Assy  
69700030 Terminal Board  
84  
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED  
SYSTEM COMPONENTS  
MR12C1H Exploded View  
85  
MR12C1H Parts List  
NO.  
1
2
FPN  
Part Description  
69700000 Mesh Enclosure  
69700031 Front Panel  
3
69700002 Axial-flow Fan  
4
5
6
7
69700003 Motor FW30G-ZL  
69700017 Tube Sensor (20K black)  
69700016 Temperature Sensor for Discharge Gas  
69700021 Sensor  
8
9
69700032 Motor suport spot welding sub-assy  
69700033 Condenser Assy  
69700019 Inhalation Tube  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
69700025 Top Cover Plate  
69700034 Rear Grill  
69700035 Discharge Tube  
69700015 Magnet Coil  
69700036 Right Side Plate  
69700011 Valve Support  
69700027 Electric box cover sub-assy  
69700029 Electric Box Assy  
69700020 Overload Protector  
69700006 Compressor Gasket  
69700037 Drainage Plug  
69700010 Cut-off Valve (3/8)  
69700009 Cut-off Valve (1/4)  
69700007 Compressor C-6RZ110H1A  
69700038 Clapboard Sub-Assy  
69700039 Chassis Sub-assy  
69700028 Main Board  
86  
FRIEDRICH AIR CONDITIONING CO.  
10001 Reunion Place, Ste. 500, San Antonio, TX 78216  
(210) 546-0500 877-599-5665 x 261 FAX (210) 546-0630  
Email: [email protected]  
www.friedrich.com  
Printed in the U.S.A.  

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