2 0 1 0
Thru-the-wall
Air Conditioners and Heat Pumps
r
ste
Ma
all
W
WallMaster® R-410A Models
Cool Only
115-Volt:WS08C10A,WS10C10A,WS12C10A
230-Volt:WS10C30A,WS13C30A,WS15C30A
Cool with Electric Heat
115-Volt:WE10C33A,WE13C33A,WE15C33A
Heat Pump with Electric Heat Back Up
230-Volt:WY09C33A,WY12C33A
WM-ServMan (4-10)
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
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.
2
•
•
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 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 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.
3
PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
•
•
•
•
•
•
•
Read the Installation/Operation Manual for this 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.
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, or not following the above
Safety Warnings 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 result in damage to the unit and/or minor to serious
property damage.
INTRODUCTION
This service manual is designed to be used in conjunction with the operation and installation manuals provided
with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT:
It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
1" Diameter Plug
(See Unit Identification.)
WSD
Sleeve
Airflow
Decorative
Front
7
6
5
3
C
6
5
4
3
2
1
B
A
B
0
1
A
7
0
S
W
#
L
E
D
O
M
Discharge
Grille
Return
Air Grille
4
FRIEDRICH wAllMAsTER MODEl NUMBER CODE
W S 08
C
1
0
A
1st DIGIT - FUNCTION
W = Thru-The-Wall, WallMaster Series
2nd DIGIT - TYPE
S = Straight Cool
E = Electric Heat
Y = Heat Pump
3rd & 4th DIGITS - APPROXIMATE BTU/HR (Cooling)
Heating BTU/HR capacity listed in Specifications/Performance Data Section
5th DIGIT - ALPHABETICAL MODIFIER
6th DIGIT - VOLTAGE
1 = 115 Volts
3 = 230-208 Volts
7th DIGIT
0 = Straight Cool & Heat Pump Models
3 = 3 KW Heat Strip, Nominal
8th DIGIT
Major Change
WallMaster Serial Number Identification Guide
SERIAL NUMBER
A
K
A
X
00001
YEAR MANUFACTURED
PRODUCTION RUN NUMBER
AK = 2010 AE = 2015
AA = 2011 AF = 2016
AB = 2012 AG = 2017
AC = 2013 AH = 2018
AD = 2014 AJ = 2019
PRODUCT LINE
X = WallMaster
MONTH MANUFACTURED
A = Jan
B = Feb
C = Mar
D = Apr
E = May
F = Jun
G = Jul
H = Aug
J = Sep
K = Oct
L = Nov
M = Dec
5
2010 PERFORMANCE DATA
EVAPORATOR AIR TEMP. EVAPORATOR TEMP.
COOLING
OPERATING
PRESSURES
BREAKER
FUSE
60 Hertz
ELECTRICAL RATINGS
R410A
CONDENSER
TEMPERATURE
DEG. F
Suction
Temp
Liquid Super
Evap
CFM
Motor
RPM
DEG. F
DEG. F
Sub-
Cooling
Discharge
Temp
PERFORMANCE
DATA*
Temp. Drop
Amps
Cool
Amps
Heat
Locked
Rotor Amps
Charge in
OZ.
Temp
Heat
Discharge
Discharge Air
T(in)
55
53
52
55
51
45
54
51
56
46
45
T(out)
60
Suction
154
F.
Amps
WS08C10A
WS10C10A
WS12C10A
WS10C30A
WS13C30A
WS15C30A
WY09C33A
WY12C33A
WE10C33A
WE13C33A
WE15C33A
57
53
54
55
51
45
54
51
56
46
45
23
129
134
128
123
134
135
123
127
128
128
135
167
177
169
165
179
181
164
147
150
174
181
65
63
60
66
59
54
65
58
58
55
54
98
11
10
11
14
8
31
36
28
28
40
40
22
26
24
34
40
462
500
500
440
535
545
450
475
477
500
545
7.1
32.0
32.5
257
260
300
300
280
250
251
265
260
240
250
1085
1080
1380
1400
1300
1345
1335
1330
1455
1350
1345
15
15
15
15
15
15
20
20
20
20
20
27
26
25
29
35
26
29
24
34
35
53
98
145
10.0
11.8
4.5
6.3
8.3
4.4
6.1
4.5
6.3
8.3
40.0
57.0
18.5
26.0
41.0
20.0
37.0
45.0
39.0
40.0
49.0
40.5
33.0
39.0
40.0
43.0
55
106
100
100
101
101
101
110
99
145
60
155
51
138
46
9
130
54
12
12
4
150
3.8
4.8
51
145
56
153
16.0
16.0
16.0
18.5
26.0
41.0
46
9
135
46
101
9
130
*Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all systems use R410A
Specifications
Room
Energy
Moisture
Side Air
Estar
Cooling
Capacity Btu
Heating
Capacity Btu
Volts
Rated
Cooling
Amps
Heating
Amps
Heating
Watts
Efꢀciecy Ratio Removal Circulation
Net Weight
Lbs
Model
Cooling Watts
EER
Pints/HR
CFM
Sleeve
WALLMASTER
Cool only
WS08C10A
7800
9700
NA
NA
NA
NA
NA
NA
115
115
7.1
788
1032
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
9.9
9.4
1.2
2.4
3.3
1.5
3.6
4.2
250
257
295
300
290
290
WSD
WSD
WSD
WSD
WSD
WSD
93
WS10C10A
WS12C10A
WS10C30A
WS13C30A
10.0
103
112
101
109
119
11900
115
11.8
1266
9.4
9500/9200
12600/12300
14500/14500
230/208
230/208
230/208
4.5/4.7
6.3/6.7
8.3/8.2
989/958
1340/1309
1706/1706
9.6/9.6
9.4/9.4
8.5/8.5
WS15C30A
Heat Pumps
WY09C33A
9300/9000
7300/7300
9350/9200
230/208
230/208
4.4/4.7
6.1/6.4
989/957
3.8/4.0
4.8/5.1
839/793
9.4/9.4
8.6/8.6
2.1
2.6
250
275
WSD
WSD
103
111
WY12C33A 12000/11800
1395/1372
1062/1010
Cool with Electric Heat
WE10C33A
WE13C33A
WE15C33A
9500/9200
12600/12300
14500/14500
11000/9100
11000/9100
11000/9100
230/208
230/208
230/208
4.5/4.7
6.3/6.7
8.3/8.8
989/958
1340/1309
1706/1706
16.0/14.7
16.0/14.7
16.0/14.7
3550/2950
3550/2950
3550/2950
9.6/9.6
9.4/9.4
8.5/8.5
1.5
3.6
4.2
300
290
290
WSD
WSD
WSD
121
107
116
WallMaster Heat Pump heating information (shown in red) indicates heat pump heating performance. WallMaster Electric Heat heating information (shown in red)
indicates electric heat strip performance. For WallMaster Heat Pump electric heating performance refer to corresponding WallMaster Electric Heat model.
DEFROST CONTROL: Initiated at 30°F (outdoor coil temperature for two
consecutive minutes) and terminated at 43°F (outdoor coil temperature). During
defrost, the compressor stops and the electric heat starts, then operates with
the fan to maintain indoor comfort. The unit remains in electric heat mode.
DEFROST DRAIN: Drain automatically opens at approximately 50°F to prevent
condensate from freezing inside drain pan.
Note: all models will produce condensate. If condensate disposal is desired, an
optional drain kit is available.
sleeve / Chassis Dimensions
27" Sleeve
Friedrich WSC
Sleeve
16 3/4
Fedders A
Sleeve
16 3/4
27
Fedders B Sleeve*
Sleeve Dimensions
Height (inches)
Width (inches)
16 3/4
27
27
Depth (inches)
16 3/4
16 3/4
16 3/4
Depth
with
Front
Minimum
Extension
Into Room
Minimum
Extension
Outside
TTW Finished Hole
Height
Width
Depth
Model
Height
Width
Max. Depth
WALLMASTER
WSD Sleeve
Chassis
16 3/4
15 3/4
27
26 1/2
16 3/4
21
23
22
7 1/2
-
9/16
-
17 1/4
-
27 1/4
-
15 5/16
-
As an
partner, Friedrich Air Conditioning Co. has determined that the selected
) meet the guidelines for energy efficiency.
(
6
ElECTRICAl DATA
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
installedbyaqualifiedelectricianandconformto
the National Electrical Code and all local codes
which have jurisdiction.
Failure to do so can result in personal injury or
death.
NOTICE
FIRE HAZARD
Not following the above WARNING could result in fire or
electically unsafe conditions which could cause moderate
or serious property damage.
Read, understand and follow the above warning.
Wire Size
Use ONLY wiring size recommended for single outlet branch circuit.
Fuse/Circuit Breaker
Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s
rating plate. Proper circuit protection is the responsibiity of the homeowner.
Grounding
Unit MUST be grounded from branch circuit through service cord to unit, or through separate
ground wire provided on permanently connected units. Be sure that branch circuit or general
purpose outlet is grounded.
Receptacle
The field supplied outlet must match plug on service cord and be within reach of service cord.
Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above
for proper receptacle and fuse type.
Plug/Outlet/Circuit Rating
Circuit Rating
Breaker or T-D Fuse
Plug Face
(NEMA#)
Wall Outlet
Appearance
Model Numbers
WS08C10A, WS10C10A,
WS12C10A
125V - 15A
5 - 15P
6 - 15P
WS10C30A, WS13C30A,
WS15C30A
250V - 15A
250V - 20A
WE10C33A, WE13C33A,
WE15C33A, WY09C33A,
WY12C33A
6 - 20P
The consumer - through the AHAM Room Air Conditioner Certification Program - can
be certain that the AHAM Certification Seal accurately states the unit’s cooling and
heating capacity rating, the amperes and the energy efficiency ratio.
*HACR: Heating Air Conditioning and Refrigeration
7
ElECTRONIC CONTROl OPERATION
PM
PM
1
Power
Power
2
8
9
3
4
Cool
Cool
Fan
Smar
Fan
Fan
Fan Only
Heat
6
5
MoneySaver®
Mode
Speed
Speed
Mode
Fan Only
7
Clock
Clock
Money
Saver
Timer
Set
Start Time
Stop Time
Timer
Set
Start Time
Stop Time
14
13
On/Of
Hour
On/Off
Hour
Temp/Hour
Temp/Hour
10 11 12
Figure 2: WY/WE Model heat-cool control panel
Figure 1: WS Model cool-only control panel
To start unit
If the air conditioner is installed and plugged into a proper receptacle,
it is ready to go. The first time the unit is started, the compressor will
delay for three minutes. See Automatic Component Protection on the
following page.
6
7
WARMER –Touch the button toraisetheroom air temperature.
Press both the and buttons at the same time to switch
the temperature from Fahrenheit (°F) to Celsius (°C). Repeat
Step 7 to switch from °C back to °F.
Touch the Power button once. The unit will automatically be in
Cool mode with the temperature set at 75°F (24°C) and the fan
speed at F1, the sleep setting.
1
To adjust fan speed
8
Touch the Fan Speed button to see the current setting. Touch
it again to change speed. F1 is the lowest setting (SLEEP
SETTING / LOW), F2 is MEDIUM, and F3 is HIGH.
To set mode of operation
When you first turn the unit on, it will be in the Cool mode with constant
fan.
To activate Smart Fan(WS cool-only models)
2
On WS cool-only models, touch the Mode button once to activate
the MoneySaver® (See item 14 for MoneySaver instructions on
WY/WE models).
9
There isafourth option, SF, whenselecting the fan speed. Thisis
the SMART FAN function. SMART FAN DOES NOT OPERATE
IN CONJUNCTION WITH THE FAN ONLY MODE.
MoneySaver® is a feature that cycles the fan with the compressor
so that the fan does not run all the time. This saves energy and
improves dehumidification. MoneySaver® will also run to test
the temperature if the off cycle is too long. Or you may prefer
constant fan for more air movement. (To return to constant fan,
touch the Mode button two more times).
To activate Smart Fan(WY/WE heat-cool models)
9
Press theSmart Fan button to activate the Smart Fan.The light
will indicate that this feature is in use.
Smart Fan will adjust the fan speed automatically to maintain the
desired comfort level. For example, if the outside doors in your home
are opened for an extended period of time, or more people enter a
room, Smart Fan may adjust to a higher fan speed to compensate
for the increased heat load. This keeps you from having to adjust
the fan speed on your own.
In order to run the fan by itself, do the following:
On WY/WS heat-cool models, touch the Mode button once to
activate the Fan Only feature. The Fan Only setting will circulate
air in the room without the compressor coming on.
3
Continuing from MoneySaver® mode, touch the Mode button
once to activate the Fan Only feature (WS cool-only models).
To set the hour clock
10
Touch the Set Hour button to see the current setting. The
number that is displayed is the approximate time (hour only).
To adjust temperature
Use the and
buttons to change the settings. BE SURE
TO SET A.M. AND P.M. ACCORDINGLY. (P.M. is indicated by
a red light in the upper left corner of the display).
Use the Mode button to select either the Cool or MoneySaver®
function (or Heat for WY/WE heat-cool models)
4
COOLER – Touch the
temperature.
button to lower the room air
5
8
To set the timer
NOTE: Set the HOUR CLOCK (Set Hour) before attempting to set
timer functions.
You can set the Start Time and Stop Time a minimum of one hour
apart, and a maximum of 23 hours apart.
11
After setting the time, press the Set Hour button once (Start
light on). Use the and buttons to select the time that the
unit will START.
12
After selecting the Start Time, press the Set Hour button once.
(Stop Light on). Use the
and
buttons to select the time
that the unit will STOP. After selecting the stopping time, press
the Set Hour button once.
13
Press the Timer On/Off button (light turns on) to activate the
timer function. To deactivate this function, press theTimer On/
Off button once again (light turns off). Once the on and off times
have been selected, they will remain in memory and cycle daily
until changed.
NOTE: If the unit is unplugged or the power is interrupted, the HOUR
must be reset or theTimer On/Off will not function when desired.
To Activate Money Saver (WY/WE models)
14
Press the Money Saver button to activate the Money Saver
feature. The light will indicate the Money Saver is in use.
MoneySaver® is a feature that cycles the fan with the compres
sor so that the fan does not run all the time. This saves energy
andimprovesdehumidification. MoneySaver® will alsorunto test
the temperature if the off cycle is too long. Or you may prefer
constant fan for more air movement. (To return to constant fan,
touch the Mode button two more times).
CHECKING ROOM TEMPERATURE
1. Check the room temperature at the electronic control
pad by pressing at the same time, the Fan Speed
button and the Temp/Hour
button (see figures 1
and 2).
2. The indoor temperature will display for 10 seconds.
Indoortemperaturecanbeviewedinallmodes,including
the Test Mode. The display can be changed back to
the SET temperature by pressing any key (except the
Power (on/off button) or it can do so automatically after
10 seconds have elapsed.
9
Temperature
Cooler
Warmer
Power
Cool
Heat
Fan
Fan
Money
Saver®
Only
Speed
Timer Operation
On/Off Start
Stop Set Hr.
Figure 3
WY/WE heat-cool model remote control
Using the remote control
To set the hour clock
To start unit
9
1
SET HOUR CLOCK - Press the Set Hr. button once to see the
current clock setting. Continue pressing the button until you
arrive at the current time (Hour only). Minutes are not shown on
the display. Make sure that the A.M. / P.M. setting is correct.
POWER- Press the Power buttononce. Theunitwill automatically
start in the mode and fan speed it was last left on.
To set mode of operation
2
COOL - Press the Cool button to automatically switch the operat-
ing mode to COOL.
To set the timer
NOTE: You can set the START and STOP times a minimum of one
hour apart, and a maximum of 23 hours apart.
3
4
FAN ONLY - Press the Fan Only button if you want to run the
fan only.
10
11
12
TIMER START - Press Start to view the current start time for cool-
ing. Continue pressingtheSTARTbutton until you arriveat the start
time you desire. The start time for cooling will then be set.
HEAT (WY/WE models only) - Press the Heat button to
automatically switch the operating mode to HEAT.
MoneySaver® - Press the Money Saver® button to activate
the MoneySaver® feature. This feature cycles the fan with the
compressor so that the fan does not run all the time.
5
TIMER STOP - Press the Stop button. Continue pressing the
STOP button until you arrive at the stop time you desire. The
stop time for cooling will then be set.
To adjust temperature
6
TIMER ON / OFF - Press the O n/Off button (under Timer
Operation) to activate (light on) or deactivate (light off) the timer.
Once the on and off times have been selected, they will remain
in memory and cycle daily until changed.
WARMER -Press the Warmer button to raise the temperature setting.
7
tting.
COOLER - Press the Cooler button to lower the temperature se
NOTE: If the unit is unplugged or the power is interrupted, the Set Hr.
function must be reset or the Timer On/Off function will not work.
To adjust fan speed
8
FAN SPEED - Press the Fan Speed button to see the current
setting. Press again to change the fan speed. F1 is the lowest
setting (SLEEP / LOW), F2 is MEDIUM, F3 is HIGH, and SF is
the SMART FAN setting.
10
ElECTRONIC CONTROl PANEl
PM
PM
1
Power
Power
2
8
9
3
4
Cool
Cool
Fan
Smar
Fan
Fan
Fan Only
Heat
MoneySaver®
6
5
Mode
Speed
Speed
Mode
Fan Only
7
Clock
Clock
Money
Saver
Timer
Set
Start Time
Stop Time
Timer
Set
Start Time
Stop Time
14
13
On/Of
Hour
On/Off
Hour
Temp/Hour
Temp/Hour
10 11 12
Figure 4: “WS” Cooling only models
Electronic Control Panel
Figure 5: “WE”/”WY” heat/cool models
Electronic Control Panel
Exiting Error Code Mode: press the Timer On/Off
button.
TESTING THE ELECTRONIC CONTROL
ACTIVATING TEST MODE
Activate Test Mode by pressing at the same time, the Mode
button and the Temp/Hour button (see figures 4 and 5).
Clearing Error Codes: Error codes are cleared
from the memory by exiting from Error Code Mode.
The LEDs for Set/Hour: “Start Time” and “Stop Time” will
blink 1 bps while Test Mode is active.
MEMORY
The electronic control has a memory to retain all
functions and settings, as set up by the user, in the event
of a power failure. For example: once power is restored
to the unit, there is a two second delay before the fan
comes on and approximately three minutes delay before
the compressor is activated providing that the mode was
set for cooling and the set point temperature has not
been met in the room.
Test Mode has a duration of 90 minutes. Test Mode can be
activated under any function, including Off.
Test Mode is cancelled by pressing the Power (on/off)
button, unplugging the unit, or when the 90 minutes times
out.
Test Mode settings are factory default of:
Unit operation On, MoneySaver On, Cool Mode, 60
degrees F, speed fan on High. “Timer” and “Set Hour”
features are non-functional.
Automatic component protection
Your unit is equipped with Automatic Component Protection.
Test Mode overrides the three minute compressor Lock-
out, all delays for fan motor start, speed change, and when
switching modes.
To protect the compressor of the unit, there is a three minute delay
if you turn the unit off or if power is interrupted. The fan will not be
affected. Also, if you switch fromCool mode to Fan Only mode, and
switch back to Cool mode, there is a three-minute delay before the
compressor comes back on.
ERROR CODE MODE
Error Code Mode is used to display all error codes
stored since reset. It is a sub-mode of Test Mode. Unit
must be in Test Mode to enter the Error Code function.
ActivatingErrorCodeMode:PresstheTIMEROn/Off”
button (see figures 4 and 5). The LED for the TIMER On/
Off will flash 1 bps (beats per second) while Error Code
Mode is active. Pressing the Temp/Hour
display “00”. Consecutive presses will scroll through all
error codes stored. Press the Temp/Hour button to
button will
see the reverse order of the error codes. When the end
of the stored error codes is reached the temperature Set
Point will appear. (Each error code is listed once)
11
ERROR CODEs lIsTING FOR “ws” MODEls
E1
SHORT CYCLE SITUATION: Defined as a
compressorthatstartsandstopsmorefrequently
than it should (more than 6 times per hour).
E4 FROST PROBE SHORT: Normal operation is
allowed. Replace probe.
E5
INDOOR PROBE OPEN: Control assumes
indoor ambient temperature is 90 degrees F and
unit will operate. Replace probe.
E2 KEYBOARD STUCK ERROR: If any key button
is stuck or pressed for 20 seconds or more, the
unit considers it stuck. If a key is stuck it will be
ignored until released. If the “Mode” keyisstuck,
the unit’s function will default to Cool mode.
E6 INDOOR PROBE SHORT: Control assumes
ambient temperature is 90 degrees F and unit
will operate. Replace probe.
E3 FROST PROBE OPEN: Normal operation is
(See note and other infomation below)
allowed. Replace probe.
ERROR CODEs lIsTING FOR “wE/wY” MODEls
E1
SHORT CYCLE SITUATION: Defined as a
compressorthatstartsandstopsmorefrequently
than it should (more than 6 times per hour).
NOTE: Allerrorcodesdisplayforprobesopenorshortedwill
allow unit to operate. Unit may ice up if faulty components
are not replaced.
E2 KEYBOARD STUCK ERROR: If any key button
is stuck or pressed for 20 seconds or more, the
unit considers it stuck. If a key is stuck it will be
ignored until released. If the “Mode” keyisstuck,
the unit’s function will default to Cool mode.
Indoor Coil Frost Probe Sensor:
Disables compressor at 30 degrees F+/- 3 degrees F.
Compressorresumesoperationwhenindoorcoiltemperature
reaches 55 degrees F.
Outdoor Coil Frost Probe Sensor (on WY models):
Disables the compressor at 30 degrees F. Compressor
resumes operation when temperature reaches 43 +/- 5
degrees F.
E3 AMBIENT (INDOOR) AIR PROBE OPEN
OR SHORT: Control will assume ambient
temperature is 90 degrees F when in Cool mode
and 60 degrees F when in Heat mode. Unit will
operate (see note below).
Indoor Air Probe Sensor:
Control range is 60 degrees F to 90 degrees F +/- 3
degrees F.
E4 EVAPORATOR TEMPERATURE PROBE
OPEN OR SHORT: Normal operation is allowed.
Replace probe (see note below).
REBOOT THE CONTROL PANEL
E5
CONDENSER
OPEN OR SHORT: Normal operation is allowed.
Replace probe.
TEMPERATURE
PROBE
Reboot the control panel as follows: With the unit on,
simultaneously hold down the Mode button and the
Temperature Arrow
button for approximately 10
seconds. If the panel will reboot, you will hear the fan come
on and the temperature window will read 60 degrees. If this
happens, all you need to do is turn the unit off for about 10
seconds and then turn it back on to finish the reboot cycle.
If the panel does not reboot, you will most likely need to
replace the electronic control.
E7
MOTOR OPERATION
E9 HEAT PUMP FAILURE
12
COMPONENTs TEsTING
ElECTRONIC CONTROl
OPERATION
WARNING
ELECTRIC SHOCK HAZARD
Heat Pump Models
If the indoor ambient air themister reads 55 degrees or
lower, the control will turn off the compressor and turn
on the electric heat and continue fan operation until temp
setting is satisfied. Then revert to standard heat pump
operation.
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
FAN MOTOR
Asingle phase permanentsplit capacitor motor is usedto drive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions. (See Figure 23)
If the compressor is time delayed, the control will:
1. Turn on the electric heat until the compressor is not time
delayed.
2. When the compressor’s 3 minute time delay is over,
turn off the electric heat, wait 5 seconds, then turn on the
compressor.
WARNING
ELECTRIC SHOCK HAZARD
Defrost:
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
If the outdoor coil thermister reads 30 degrees or lower
for 2 minutes continuously, the control will turn off the
compressor and turn on the electric heat and continue fan
operation.
FAN MOTOR - TEST
If the outdoor coil thermister reaches 43 degrees and
the compressor has waited the standard delay time of
180-240 seconds, the control will:
1. Turn off the backup electric heat
2. Wait 5 seconds
1. Make sure the motor has cooled down.
2. Disconnect the fan motor wires from the control board.
3. Test for continuity between the windings also, test to
ground.
3. Turn on the compressor
4. Continue fan operation.
4. If any winding is open or grounded replace the motor.
COIl sENsORs
Positioning of the Coil Sensors (Thermisters) is critical to
Fan Motor
proper operation of the Electronic Control.
Ensure that sensors are positioned as indicated in the
illustrations below.
13
COMPONENTs TEsTING (Continued)
CAPACITORs
HEATING ELEMENT
WARNING
(“WE” &”WY” Models)
ELECTRIC SHOCK HAZARD
All “WE” and “WY” models are equipped with a 3.3 KW
heating element.
Turn off electric power before servicing.
Discharge capacitor with a 20,000 Ohm 2 Watt
resistor before handling.
The heating element has two heater limit switches
(bimetal thermostats) connected in series with it. The
Primary limit located near the bottom, will open the
circuit when the temperature reaches 130°F +/-5°. The
Secondary is a high limit switch near the top of the
element. It is designed to open the circuit at 165°F +/-8°.
Failure to do so may result in personal injury,
or death.
Many motor capacitors are internally fused. Shorting the
terminals will blow the fuse, ruining the capacitor. A 20,000
ohm 2 watt resistor can be used to discharge capacitors
safely. Remove wires from capacitor and place resistor
across terminals. When checking a dual capacitor with
a capacitor analyzer or ohmmeter, both sides must be
tested.
Should the fan motor fail or filter become clogged etc.,
the high limit switch will open and interrupt the power to
the heater before reaching an unsafe temperature
condition.
Capacitor Check with Capacitor Analyzer
Test the heater element for continuity below 130°F.
Heating Element
The capacitor analyzer will show whether the capacitor is
“open” or “shorted.” It will tell whether the capacitor is within
its micro farads rating and it will show whether the capacitor
is operating at the proper power-factor percentage. The
instrument will automatically discharge the capacitor when
the test switch is released.
Capacitor Connections
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
Not actual element - for reference only
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possible short in the capacitor. However, from the “S” or
start terminal, a much higher potential, possibly as high as
400 volts, exists because of the counter EMF generated
in the start winding. Therefore, the possibility of capacitor
failure is much greater when the identified terminal is
connected to the “S” or start terminal. The identified
terminal should always be connected to the supply line, or
“R” terminal, never to the “S” terminal.
DRAIN PAN VALVE
During the cooling mode of operation, condensate which
collects in the drain pan is picked up by the condenser
fan blade and sprayed onto the condenser coil. This as-
sists in cooling the refrigerant plus evaporating the water.
During the heating mode of operation, it is necessary that
water be removed to prevent it from freezing during cold
outside temperatures. This could cause the condenser
fan blade to freeze in the accumulated water and prevent
it from turning.
When connected properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector
will protect the main winding from excessive temperature.
To provide a means of draining this water, a bellows type
drain valve is installed over a drain opening in the base
pan. This valve is temperature sensitive and will open
when the outside temperature reaches 40°F. The valve
will close gradually as the temperature rises above 40°F
to fully close at 60°F.
Drain Pan Valve
14
REFRIGERATION sYsTEM sEQUENCE OF OPERATION
A good understanding of the basic operation of the
refrigeration system is essential for the service technician.
Without this understanding, accurate troubleshooting of
refrigeration system problems will be more difficult and time
consuming, if not (in some cases) entirely impossible. The
refrigeration system uses four basic principles (laws) in its
operation they are as follows:
The refrigerant leaves the condenser Coil through the liquid
line as a warm high pressure liquid. It next will pass through
the refrigerant drier (if so equipped). It is the function of the
driertotrapanymoisturepresentinthesystem,contaminants,
and large particulate matter.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
1. “Heat always flows from a warmer body to a cooler
body.”
2. “Heat must be added to or removed from a substance
before a change in state can occur”
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
3. “Flow is always from a higher pressure area to a lower
pressure area.”
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
indoor air across the finned surface of the evaporator coil,
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
heat. The condenser fan moving air across the coil’s finned
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
heated even further by the air that continues to flow across
the evaporator coil.
When a sufficient quantity of heat has been removed from
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
the air that continues to flow across the condenser coil.
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The WallMaster design determines at exactly what point (in
the condenser) the change of state (i.e. gas to a liquid)
takes place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant then
returns to the compressor, where the cycle is repeated.
Suction
Line
Discharge
Line
Condenser
Coil
Evaporator
Coil
Compressor
Metering
Device
Refrigerant Drier
Liquid
Line
Refrigerant
Strainer
15
R-410A sEAlED sYsTEM REPAIR CONsIDERATIONs
WARNING
Refrigeration system under high pressure
Do not puncture, heat, expose to flame or incinerate.
Only certified refrigeration technicians should
service this equipment.
R410Asystems operate at higher pressures than
R22 equipment.Appropriate safe service and
handling practicces must be used.
Only use gauge sets designed for use with R410A.
Do not use standard R22 gauge sets.
The following is a list of important considerations when working with R-410A equipment
•
•
•
R-410A pressure is approximately 60% higher than R-22 pressure.
R-410A cylinders must not be allowed to exceed 125 F, they may leak or rupture.
R-410A must never be pressurized with a mixture of air, it may become
flammable.
•
•
Servicing equipment and components must be specifically designed for use with R-410A and
dedicated to prevent contamination.
Manifold sets must be equipped with gauges capable of reading 750 psig (high side) and 200
psig (low side), with a 500-psig low-side retard.
•
•
Gauge hoses must have a minimum 750-psig service pressure rating
Recovery cylinders must have a minimum service pressure rating of 400 psig, (DOT 4BA400
and DOT BW400 approved cylinders).
•
•
POE (Polyol-Ester) lubricants must be used with R-410A equipment.
To prevent moisture absorption and lubricant contamination, do not leave the refrigeration
system open to the atmosphere longer than 1 hour.
•
•
•
•
Weigh-in the refrigerant charge into the high side of the system.
Introduce liquid refrigerant charge into the high side of the system.
For low side pressure charging of R-410A, use a charging adaptor.
Use Friedrich approved R-410A filter dryers only.
16
R-410A sEAlED REFRIGERATION sYsTEM REPAIRs
IMPORTANT
SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.
SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.
EQUIPMENT REQUIRED:
9. High Pressure Gauge - (0 to 750 lbs.)
10. Low Pressure Gauge - (-30 to 200 lbs.)
11. Vacuum Gauge - (0 - 1000 microns)
1. Voltmeter
2. Ammeter
3. Ohmmeter
12. Facilities for flowing nitrogen through refrigeration tubing
4. E.P.A. Approved Refrigerant Recovery System
during all brazing processes.
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
EQUIPMENT MUST BE CAPABLE OF:
6. Acetylene Welder
1. Recovering refrigerant to EPA required levels.
7. Electronic Halogen Leak Detector capable of
2. Evacuation from both the high side and low side of the
system simultaneously.
detecting HFC (Hydrofluorocarbon) refrigerants.
8. Accurate refrigerant charge measuring device such
as:
3. Introducing refrigerant charge into high side of the
system.
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
4. Accurately weighing the refrigerant charge introduced
into the system.
Proper refrigerant charge is essential to proper unit operation.
Operating a unit with an improper refrigerant charge will
result in reduced performance (capacity) and/or efficiency.
Accordingly, the use of proper charging methods during
servicing will insure that the unit is functioning as designed
and that its compressor will not be damaged.
WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.
Too much refrigerant (overcharge) in the system is just as bad
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
problems (such as low air flow across evaporator, etc.) are
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
failure, and/or other mechanical failure. The specific type of
failure will be influenced by the amount of liquid being returned,
and the length of time the slugging continues.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
Refrigerant Charging
Not enough refrigerant (undercharge) on the other hand, will
cause the temperature of the suction gas to increase to the point
where it does not provide sufficient cooling for the compressor
motor. When this occurs, the motor winding temperature will
increase causing the motor to overheat and possibly cycle open
the compressor overload protector. Continued overheating of
the motor windings and/or cycling of the overload will eventually
lead to compressor motor or overload failure.
NOTE: Because the Wallmaster system is a sealed system,
service process tubes will have to be installed. First install a
line tap and remove refrigerant from system. Make necessary
sealed system repairs and vacuum system. Crimp process
tube line and solder end shut. Do not leave a service valve in
the sealed system.
17
Method Of Charging / Repairs
The acceptable method for charging the WallMaster system
is the Weighed in Charge Method. The weighed in charge
method is applicable to all units. It is the preferred method to
use, as it is the most accurate.
The weighed in method should always be used whenever
a charge is removed from a unit such as for a leak repair,
compressor replacement, or when there is no refrigerant
charge left in the unit. To charge by this method, requires the
following steps:
1. Install a piercing valve to remove refrigerant from the
sealedsystem. (Piercing valve must be removed from the
system before recharging.)
2. Recover Refrigerant in accordance with EPA regulations.
WARNING
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
3. Install a process tube to sealed system.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.
4. Make necessary repairs to system.
5. Evacuate system to 200 microns or less.
6. Weigh in refrigerant with the property quantity of R-410A
refrigerant.
7. Start unit, and verify performance.
WARNING
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
8. Crimp the process tube and solder the end shut.
18
WARNING
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to do so could result in serious injury or
death.
Failure to follow these procedures could
result in serious injury or death.
Undercharged Refrigerant systems
An undercharged system will result in poor performance
(low pressures, etc.) in both the heating and cooling
cycle.
A check of the amperage drawn by the compressor
motor should show a lower reading. (Check the Unit
Specification.) After the unit has run 10 to 15 minutes,
check the gauge pressures. Gauges connected to system
with an undercharge will have low head pressures and
substantially low suction pressures.
Whenever you service a unit with an undercharge of
refrigerant, always suspect a leak. The leak must be
repaired before charging the unit.
To check for an undercharged system, turn the unit on,
allow the compressor to run long enough to establish
working pressures in the system (15 to 20 minutes).
During the cooling cycle you can listen carefully at the exit
of the metering device into the evaporator; an intermittent
hissing and gurgling sound indicates a low refrigerant
charge. Intermittent frosting and thawing of the evaporator
is another indication of a low charge, however, frosting
and thawing can also be caused by insufficient air over
the evaporator.
Checks for an undercharged system can be made at
the compressor. If the compressor seems quieter than
normal, it is an indication of a low refrigerant charge.
of the evaporator will not be encountered because the
refrigerant will boil later if at all. Gauges connected to
system will usually have higher head pressure (depending
upon amount of over charge). Suction pressure should be
slightly higher.
Overcharged Refrigerant systems
Compressor amps will be near normal or higher.
Noncondensables can also cause these symptoms. To
confirm, remove some of the charge, if conditions improve,
system may be overcharged. If conditions don’t improve,
Noncondensables are indicated.
Whenever an overcharged system is indicated, always
make sure that the problem is not caused by air flow
problems. Improper air flow over the evaporator coil may
indicate some of the same symptoms as an over charged
system.
An overcharge can cause the compressor to fail, since it
would be “slugged” with liquid refrigerant.
Thechargeforanysystemiscritical. Whenthecompressor
is noisy, suspect an overcharge, when you are sure that
the air quantity over the evaporator coil is correct. Icing
19
Restricted Refrigerant system
Troubleshooting a restricted refrigerant system can be
difficult. The following procedures are the more common
problems and solutions to these problems. There are two
types of refrigerant restrictions: Partial restrictions and
complete restrictions.
at the metering device entrance to the evaporator. The
evaporator in a partial restriction could be partially frosted
or have an ice ball close to the entrance of the metering
device. Frost may continue on the suction line back to the
compressor.
A partial restriction allows some of the refrigerant to
circulate through the system.
Often a partial restriction of any type can be found by feel,
as there is a temperature difference from one side of the
restriction to the other.
With a complete restriction there is no circulation of
refrigerant in the system.
With a complete restriction, there will be no sound at the
metering device entrance. An amperage check of the
compressor with a partial restriction may show normal
current when compared to the unit specifi cation. With a
complete restriction the current drawn may be considerably
less than normal, as the compressor is running in a deep
vacuum (no load.) Much of the area of the condenser will
be relatively cool since most or all of the liquid refrigerant
will be stored there.
Restricted refrigerant systems display the same symptoms
as a “low-charge condition.”
When the unit is shut off, the gauges may equalize very
slowly.
Gauges connected to a completely restricted system will
run in a deep vacuum. When the unit is shut off, the gauges
will not equalize at all.
The following conditions are based primarily on a system
in the cooling mode.
A quick check for either condition begins at the evaporator.
With a partial restriction, there may be gurgling sounds
20
HERMETIC COMPONENTs CHECK
WARNING
BURN HAZARD
WARNING
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to follow these procedures could
result in moderate or serious injury.
Failure to do so could result in serious injury.
METERING DEVICE
Capillary Tube systems
All units are equipped with capillary tube metering
devices.
3. Switch the unit to the heating mode and observe the
gauge readings after a few minutes running time. If
the system pressure is lower than normal, the heating
capillary is restricted.
Checking for restricted capillary tubes.
1. Connect pressure gauges to unit.
4. If the operating pressures are lower than normal in both
the heating and cooling mode, the cooling capillary is
restricted.
2. Start the unit in the cooling mode. If after a few minutes
of operation the pressures are normal, the check valve
and the cooling capillary are not restricted.
CHECK VAlVE
Failure of the slide in the check valve to seat properly in
either mode of operation will cause flooding of the cooling
coil. This is due to the refrigerant bypassing the heating or
cooling capillary tube and entering the liquid line.
A unique two-way check valve is used on the reverse cycle
heat pumps. It is pressure operated and used to direct the
flow of refrigerant through a single filter drier and to the
proper capillary tube during either the heating or cooling
cycle.
COOLING MODE
In the cooling mode of operation, liquid refrigerant from
condenser (liquid line) enters the cooling check valve
forcing the heating check valve shut. The liquid refrigerant
is directed into the liquid dryer after which the refrigerant
is metered through cooling capillary tubes to evaporator.
(Note: liquid refrigerant will also be directed through the
heating capillary tubes in a continuous loop during the
cooling mode).
One-way Check Valve
(Heat Pump Models)
HEATING MODE
NOTE: The slide (check) inside the valve is made of teflon.
Should it become necessary to replace the check valve,
place a wet cloth around the valve to prevent overheating
during the brazing operation.
In the heating mode of operation, liquid refrigerant from
the indoor coil enters the heating check valve forcing the
cooling check valve shut. The liquid refrigerant is directed
into the liquid dryer after which the refrigerant is metered
through the heating capillary tubes to outdoor coils. (Note:
liquid refrigerant will also be directed through the cooling
capillary tubes in a continuous loop during the heating
mode).
CHECK VALVE OPERATION
In the cooling mode of operation, high pressure liquid enters
the check valve forcing the slide to close the opposite port
(liquid line) to the indoor coil. Refer to refrigerant flow chart.
This directs the refrigerant through the filter drier and cooling
capillary tube to the indoor coil.
In the heating mode of operation, high pressure refrigerant
enters the check valve from the opposite direction, closing
the port (liquid line) to the outdoor coil. The flow path of the
refrigerant is then through the filter drier and heating capillary
to the outdoor coil.
21
REVERsING VAlVE DEsCRIPTION/OPERATION
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before servicing.
Failure to follow this warning could result in
serious injury or death.
The Reversing Valve controls the direction of refrigerant flow
“A”and“B”portsofthepilotvalve.Athirdcapillaryisacommon
return line from these ports to the suction tube on the main
valve body. Four-way reversing valves also have a capillary
tube from the compressor discharge tube to the pilot valve.
to the indoor and outdoor coils. It consists of a pressure-
operated, main valve and a pilot valve actuated by a solenoid
plunger. The solenoid is energized during the heating cycle
only. The reversing valves used in the sealed system is a 2
position, 4 port valve.
The piston assembly in the main valve can only be shifted
by the pressure differential between the high and low sides
of the system. The pilot section of the valve opens and
closes ports for the small capillary tubes to the main valve
to cause it to shift.
The single tube on one side of the main valve body is the
high-pressure inlet to the valve from the compressor. The
center tube on the opposite side is connected to the low
pressure (suction) side of the system. The other two are
connected to the indoor and outdoor coils. Small capillary
tubes connect each end of the main valve cylinder to the
NOTE: System operating pressures must be near
normal before valve can shift.
2 POSITION, 4 PORT REVERSING VALVE
22
TEsTING THE COIl
pressure to build in the system. Then switch the system
from heating to cooling.
WARNING
ELECTRIC SHOCK HAZARD
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
If the valve is stuck in the heating position, block the air
flow through the indoor coil and allow discharge pressure
to build in the system. Then switch the system from
heating to cooling.
Failure to do so could result in electric shock,
serious injury or death.
Should the valve fail to shift in either position after
increasing the discharge pressure, replace the valve.
The solenoid coil is an electromagnetic type coil mounted
on the reversing valve and is energized during the
operation of the compressor in the heating cycle.
Dented or damaged valve body or capillary tubes can
prevent the main slide in the valve body from shifting.
1. Turn off high voltage electrical power to unit.
If you determing this is the problem, replace the reversing
valve.
2. Unplug line voltage lead from reversing valve coil.
3. Check for electrical continuity through the coil. If you
do not have continuity replace the coil.
After all of the previous inspections and checks have
been made and determined correct, then perform the
“Touch Test” on the reversing valve.
4. Check from each lead of coil to the copper liquid line
as it leaves the unit or the ground lug. There should
be no continuity between either of the coil leads
and ground; if there is, coil is grounded and must be
replaced.
5. If coil tests okay, reconnect the electrical leads.
6. Make sure coil has been assembled correctly.
NOTE: Do not start unit with solenoid coil removed from
valve, or do not remove coil after unit is in operation. This
will cause the coil to burn out.
CHECKING THE REVERsING VAlVE
NOTE: You must have normal operating pressures before
the reversing valve can shift.
WARNING
HIGH PRESSURE HAZARD
Reversing Valve in Heating Mode
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
Check the operation of the valve by starting the system
and switching the operation from “Cooling” to “Heating”
and then back to “Cooling”. Do not hammer on valve.
Occasionally, the reversing valve may stick in the heating
or cooling position or in the mid-position.
When sluggish or stuck in the mid-position, part of the
discharge gas from the compressor is directed back to the
suction side, resulting in excessively high suction pressure.
Should the valve fail to shift from coooling to heating, block
the air flow through the outdoor coil and allow the discharge
23
Touch Test in Heating/Cooling Cycle
6. Protectnewvalvebodyfromheatwhilebrazingwith plastic
heat sink (Thermo Trap) or wrap valve body with wet
rag.
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
7. Fit all lines into new valve and braze lines into new
valve.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
WARNING
EXPLOSION HAZARD
Failure to follow these procedures could
result in minor to moderate injury.
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
The only definite indications that the slide is in the mid-
position is if all three tubes on the suction side of the valve
are hot after a few minutes of running time.
Failure to follow proper safety procedures
could result in serious injury or death.
8. Pressurize sealed system with a combination of R-22
and nitrogen and check for leaks, using a suitable leak
detector. Recover refrigerant per EPA guidelines.
NOTE: A condition other than those illustrated above, and
on Page 31, indicate that the reversing valve is not shifting
properly. Both tubes shown as hot or cool must be the same
corresponding temperature.
9. Once the sealed system is leak free, install solenoid coil
on new valve and charge the sealed system by weighing
in the proper amount and type of refrigerant as shown
on rating plate. Crimp the process tubes and solder the
ends shut. Do not leave Schrader or piercing valves in
the sealed system.
Procedure For Changing Reversing Valve
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
NOTE: When brazing a reversing valve into the system, it is
of extreme importance that the temperature of the valve does
not exceed 250°F at any time.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Wrap the reversing valve with a large rag saturated with
water. “Re-wet” the rag and thoroughly cool the valve after
each brazing operation of the four joints involved.
Failure to follow these procedures could
result in serious injury or death.
The wet rag around the reversing valve will eliminate
conduction of heat to the valve body when brazing the line
connection.
NOTICE
FIRE HAZARD
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
1. Install Process Tubes. Recover refrigerant from sealed
system. PROPER HANDLING OF RECOVERED
REFRIGERANT ACCORDING TO EPA REGULATIONS
IS REQUIRED.
2. Remove solenoid coil from reversing valve. If coil is to
be reused, protect from heat while changing valve.
3. Unbraze all lines from reversing valve.
4. Clean all excess braze from all tubing so that they will
slip into fittings on new valve.
5. Remove solenoid coil from new valve.
24
COMPREssOR CHECKs
External Overload
WARNING
ELECTRIC SHOCK HAZARD
The compressor is equipped with an external overload
which senses both motor amperage and winding tem-
perature. High motor temperature or amperage heats the
overload causing it to open, breaking the common circuit
within the compressor.
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Heat generated within the compressor shell, usually due
to recycling of the motor, is slow to dissipate. It may take
anywhere from a few minutes to several hours for the
overload to reset.
Failure to do so could result in serious injury or
death.
locked Rotor Voltage (l.R.V.) Test
Locked rotor voltage (L.R.V.) is the actual voltage available
at the compressor under a stalled condition.
Checking the External Overload
single Phase Connections
Disconnect power from unit. Using a voltmeter, attach one
lead of the meter to the run “R” terminal on the compressor
and the other lead to the common “C” terminal of the com-
pressor. Restore power to unit.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
Determine l.R.V.
Start the compressor with the volt meter attached; then stop
the unit. Attempt to restart the compressor within a couple
of seconds and immediately read the voltage on the meter.
The compressor under these conditions will not start and will
usually kick out on overload within a few seconds since the
pressures in the system will not have had time to equalize.
Voltage should be at or above minimum voltage of 197 VAC,
as specified on the rating plate. If less than minimum, check
for cause of inadequate power supply; i.e., incorrect wire
size, loose electrical connections, etc.
Failure to do so could result in serious injury or
death.
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
Amperage (l.R.A.) Test
The running amperage of the compressor is the most impor-
tant of these readings. A running amperage higher than that
indicated in the performance data indicates that a problem
exists mechanically or electrically.
Failure to follow this warning could result
in moderate to serious injury.
With power off, remove the leads from compressor termi-
nals. If the compressor is hot, allow the overload to cool
before starting check. Using an ohmmeter, test continu-
ity across the terminals of the external overload. If you
do not have continuity; this indicates that the overload is
open and must be replaced.
Single Phase Running and L.R.A. Test
NOTE: Consult the specification and performance section
for running amperage. The L.R.A. can also be found on the
rating plate.
Select the proper amperage scale and clamp the meter
probe around the wire to the “C” terminal of the compressor.
Turn on the unit and read the running amperage on the me-
ter. If the compressor does not start, the reading will indicate
the locked rotor amperage (L.R.A.).
25
single Phase Resistance Test
Many compressor failures are caused by the following
conditions:
WARNING
ELECTRIC SHOCK HAZARD
1. Improper air flow over the evaporator.
Turn off electric power before service or
2. Overcharged refrigerant system causing liquid to be
returned to the compressor.
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
3. Restricted refrigerant system.
4. Lack of lubrication.
Failure to do so could result in serious injury or
death.
Remove the leads from the compressor terminals and set
the ohmmeter on the lowest scale (R x 1).
5. Liquid refrigerant returning to compressor causing oil
to be washed out of bearings.
Touch the leads of the ohmmeter from terminals common
to start (“C” to “S”). Next, touch the leads of the ohmmeter
from terminals common to run (“C” to “R”).
6.
Noncondensables such as air and moisture in
the system. Moisture is extremely destructive to a
refrigerant system.
Add values “C” to “S” and “C” to “R” together and
check resistance from start to run terminals (“S” to “R”).
Resistance “S” to “R” should equal the total of “C” to “S”
and “C” to “R.”
7. Defective capacitor.
In a single phase PSC compressor motor, the highest
value will be from the start to the run connections (“S” to
“R”). The next highest resistance is from the start to the
common connections (“S” to “C”). The lowest resistance
is from the run to common. (“C” to “R”) Before replacing a
compressor, check to be sure it is defective.
GROUND TEST
Use an ohmmeter set on its highest scale. Touch one
lead to the compressor body (clean point of contact as
a good connection is a must) and the other probe in turn
to each compressor terminal. If a reading is obtained the
compressor is grounded and must be replaced.
Check the complete electrical system to the compressor
and compressor internal electrical system, check to be
certain that compressor is not out on internal overload.
Complete evaluation of the system must be made
whenever you suspect the compressor is defective. If
the compressor has been operating for sometime, a
careful examination must be made to determine why the
compressor failed.
26
COMPREssOR REPlACEMENT
Recommendedprocedureforcompressor
replacement
3. After all refrigerant has been recovered, disconnect
suction and discharge lines from the compressor and
remove compressor. Be certain to have both suction
and discharge process tubes open to atmosphere.
WARNING
4. Carefully pour a small amount of oil from the suction
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
stub of the defective compressor into a clean
container.
5. Using an acid test kit (one shot or conventional kit), test
the oil for acid content according to the instructions
with the kit.
Failure to do so could result in electric shock,
serious injury or death.
6. If any evidence of a burnout is found, no matter how
slight, the system will need to be cleaned up following
proper procedures.
1. Be certain to perform all necessary electrical and
refrigeration tests to be sure the compressor is
actually defective before replacing.
7. Install the replacement compressor.
WARNING
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow proper safety procedures
result in serious injury or death.
Failure to follow these procedures could
result in serious injury or death.
8. Pressurize with a combination of R-22 and nitrogen
and leak test all connections with an electronic or
Halide leak detector. Recover refrigerant and repair
any leaks found.
2. Recover all refrigerant from the system though
the process tubes. PROPER HANDLING OF
RECOVERED REFRIGERANT ACCORDING TO
EPA REGULATIONS IS REQUIRED. Do not use
gauge manifold for this purpose if there has been
a burnout. You will contaminate your manifold and
hoses. Use a Schrader valve adapter and copper
tubing for burnout failures.
Repeat Step 8 to insure no more leaks are present.
9. Evacuate the system with a good vacuum pump capable
of a final vacuum of 300 microns or less. The system
should be evacuated through both liquid line and suction
line gauge ports. While the unit is being evacuated, seal
all openings on the defective compressor. Compressor
manufacturers will void warranties on units received not
properly sealed. Do not distort the manufacturers tube
connections.
WARNING
HIGH TEMPERATURES
Extreme care, proper judgment and all safety
procedures must be followed when testing,
troubleshooting, handling or working around
unit while in operation with high temperature
components. Wear protective safety aids
such as: gloves, clothing etc.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to do so could result in serious burn
injury.
Failure to follow these procedures could
result in minor to moderate injury.
NOTICE
FIRE HAZARD
10. Recharge the system with the correct amount of
refrigerant. The proper refrigerant charge will be
found on the unit rating plate. The use of an accurate
measuring device, such as a charging cylinder,
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
electronic scales or similar device is necessary.
27
SPECIAL PROCEDURE IN THE CASE OF MOTOR
COMPRESSOR BURNOUT
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
Failure to do so may result in personal injury,
or death.
WARNING
HIGH PRESSURE HAZARD
SealedRefrigerationSystemcontainsrefrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
result in serious injury or death.
1.
2.
Recover all refrigerant and oil from the system.
Remove compressor, capillary tube and filter drier
from the system.
3.
Flush evaporator condenser and all connecting
tubing with dry nitrogen or equivalent. Use approved
flushing agent to remove all contamination from
system. Inspect suction and discharge line for
carbon deposits. Remove and clean if necessary.
Ensure all acid is neutralized.
4. Reassemble the system, including new drier strainer
and capillary tube.
5. Proceed with step 8-10 on previous page.
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING
AND SERVICE
Basically, troubleshooting and servicing rotary compres-
sors is the same as on the reciprocating compressor with
only one main exception:
NEVER, under any circumstances, liquid charge a rotary
compressor through the LOW side. Doing so would cause
permanent damage to the new compressor.
28
ROUTINE MAINTENANCE
AIR FILTER
WARNING
Clean the unit air intake filter at least every 300 to 350 hours
of operation. Clean the filters with a mild detergent in warm
water and allow to dry thoroughly before reinstalling.
ELECTRIC SHOCK HAZARD
Turn off electric power before inspections,
maintenances, or service.
COILS AND BASE PAN
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
The indoor coil (evaporator coil), the outdoor coil (condenser
coil) and base pan should be inspected periodically
(yearly or bi-yearly) and cleaned of all debris (lint, dirt,
leaves, paper, etc.). Clean the coils and base pan with a soft
brush and compressed air or vacuum. If using a pressure
washer, be careful not to bend the aluminium fin pack. Use
a sweeping up and down motion in the direction of the verti-
cal aluminum fin pack when pressure cleaning coils. Cover
all electrical components to protect them from water or spray.
Allow the unit to dry thoroughly before reinstalling it in the
sleeve.
Failure to do so could result in serious injury
or death.
WARNING
EXCESSIVE WEIGHT HAZARD
Use two people to lift or carry the unit, and wear
proper protective clothing.
BLOWER WHEEL / HOUSING / CONDENSER FAN /
SHROUD
Failure to do so may result in personal injury.
Inspect the indoor blower housing, evaporator blade, con-
denser fan blade and condenser shroud periodically (yearly
or bi-yearly) and clean of all debris (lint, dirt, mold, fungus,
etc.). Clean the blower housing area and blower wheel with
an antibacterial / antifungal cleaner. Use a biodegradable
cleaning agent and degreaser on condenser fan and con-
denser shroud. Use warm or cold water when rinsing these
items. Allow all items to dry thoroughly before reinstalling
them.
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
ELECTRONIC / ELECTRICAL / MECHANICAL
NOTICE
Units are to be inspected and serviced by qualified service
personnel only. Use proper protection on surrounding
property. Failure to follow this notice could result in
moderate or serious property damage.
Periodically (at least yearly or bi-yearly): inspect all control
components: electronic, electrical and mechanical, as well as
the power supply. Use proper testing instruments (voltmeter,
ohmmeter, ammeter, wattmeter, etc.) to perform electrical
tests. Use an air conditioning or refrigeration thermometer
to check room, outdoor and coil operating temperatures.
Use an electronic tester to measure wet bulb temperatures
indoors and outdoors.
NOTICE
Do not use a caustic coil cleaning agent on coils or base
pan. Use a biodegradable cleaning agent and degreaser,
to prevent damage to the coil and/or base pan.
29
ROUTINE MAINTENANCE (Continued)
NOTICE
Do not drill holes in the bottom of the drain pan or the
underside of the unit. Not following this notice could
result in damage to the unit or condensate water leaking
inappropriately which could cause water damage to
surrounding property.
SLEEVE / DRAIN
Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and
debris. Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and
ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as
needed.
FRONT COVER
Clean the front cover when needed. Use a mild detergent. Wash and rinse with warm water. Allow it to dry
thoroughly before reinstalling it in the chassis.
CLEARANCES
Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised
or altered.
1" Diameter Plug
WSD
Sleeve
Airflow
Decorative
Front
7
6
5
3
C
6
5
4
3
2
1
B
A
B
0
1
A
7
0
S
W
#
L
E
D
O
M
Discharge
Grille
Return
Air Grille
30
ROOM AIR CONDITIONER UNIT
PERFORMANCE TEsT DATA sHEET
DATE: _______________ MODEL:_______________ SERIAL:________________
YES
____
____
____
NO
IS THERE A FRIEDRICH SLEEVE INSTALLED?
IS THERE A FRIEDRICH OUTDOOR GRILL INSTALLED?
IS MAINTENANCE BEING PERFORMED?
____
____
____
If NO is checked use back of sheet for explanation
ELECTRICAL:
LINE VOLTAGE (STATIC)
START UP VOLTAGE
AMPERAGE DRAW
--------- VOLTS
--------- VOLTS
--------- AMPS (COOL)
--------- AMPS (HEAT)
AMPERAGE DRAW
COMPRESSOR
LOCKED ROTOR AMPS
RUNNING AMPERAGE DRAW
--------- AMPS
--------- AMPS
INDOOR TEMPERATURES:
INDOOR AMBIENT TEMPERATURE
RELATIVE HUMIDITY (RH) INDOOR
-------- F
-------- %
COOL
HEAT
DISCHARGE AIR TEMPERATURE (INDOOR)
RETURN AIR TEMPERATURE (INDOOR)
---------- F --------- F
---------- F --------- F
OUTDOOR TEMPERATURE:
OUTDOOR AMBIENT TEMPERATURE
RH OUTDOOR
--------- F
--------- %
DISCHARGE AIR TEMPERATURE (OUTDOOR)
INTAKE AIR TEMPERATURE (OUTDOOR
--------- F ---------- F
--------- F ---------- F
APPLICATION USE ------------------------- ROOM (RESIDENTIAL OR COMMERCIAL)
COOLING OR HEATING AREA W ---------- X L ----------- X H ----------- = SQ/CU/FT ------------
This is a general guide.
Please consult manual J or M for exact load calculations.
Due to variations in room design, climate zone and occupancy, larger areas
may require the use of multiple units to provide the optimal cooling solution.
31
GENERAl TROUBlEsHOOTING TIPs
Problem
Possible Cause
Possible Solution
Turn the unit to the on position and raise or
lower temperature setting (as appropriate) to
call for operation.
The unit is turned to the off position,
Plug into a properly grounded 3 prong
receptacle. See “Electrical Rating Tables” on
pg. 6 for the proper receptacle type for your
unit.
The LCDI power cord is unplugged.
Press and release RESET (listen for click;
Reset button latches and remains in) to resume
operation.
Unit does not operate.
The LCDI power cord has tripped
(Reset button has popped out).
Reset the circuit breaker, or replace the fuse as
applicable. If the problem continues, contact a
licensed electrician.
The circuit breaker has tripped or
the supply circuit fuse has blown.
There has been a local power
failure.
The unit will resume normal operation once
power has been restored.
Other appliances are being used on
the same circuit.
The unit requires a dedicated outlet circuit, not
shared with other appliances.
Do NOT use an extension cord with this or any
other air conditioner.
An extension cord is being used.
Unit Trips Circuit Breaker or
Blows Fuses.
Replace with a circuit breaker or time-delay
fuse of the proper rating. See “Electrical
Rating Tables” on pg. 6 for the proper circuit
breaker/fuse rating for your unit. If the problem
continues, contact a licensed electrician.
The circuit breaker or time-delay
fuse is not of the proper rating.
The LCDI power cord can trip
(Reset button pops out) due to
disturbances on your power supply
line.
Press and release RESET (listen for click;
Reset button latches and remains in) to resume
normal operation.
LCDI Power Cord Trips (Reset
Button Pops Out).
Once the problem has been determined and
corrected, press and release RESET (listen for
click; Reset button latches and remains in) to
resume normal operation.
Electrical overload, overheating, or
cord pinching can trip (Reset button
pops out) the LCDI power cord.
NOTE: A damaged power supply cord must be replaced with a new power supply cord
obtained from the product manufacturer and must not be repaired.
Ensure that the return and/or discharge air
The return/discharge air grille is
paths are not blocked by curtains, blinds,
blocked.
furniture, etc.
Windows or doors to the outside are
Ensure that all windows and doors are closed.
open.
The temperature is not set at a cool
enough/warm enough setting.
Adjust the Temperature control to a cooler or
warmer setting as necessary.
Unit Does Not Cool/Heat
On And Off Too Frequently.
remove obstruction.
The indoor coil or outdoor coil is
dirty or obstructed.
Clean the coils, (See Routine Maintenance), or
remove obstruction.
Be sure to use exhaust vent fans while cooking
or bathing and, if possible, try not to use heat
producing appliances during the hottest part of
the day.
There is excessive heat or moisture
(cooking, showers, etc.) in the room.
The temperature of the room you
are trying to cool is extremely hot.
Allow additional time for the air conditioner to
cool off a very hot room.
32
GENERAl TROUBlEsHOOTING TIPs (CONTINUED)
Problem
Possible Cause
Possible Solution
Do not try to operate your air conditioner in the
cooling mode when the outside temperature
is below 60° F (16° C). The unit will not cool
properly, and the unit may be damaged.
The outside temperature is below
60° F (16° C).
Since the fan does not circulate the room
air continuously at this setting, the room air
does not mix as well and hot (or cold) spots
may result. Using the continuous fan setting
is recommended to obtain optimum comfort
levels.
The digital control is set to fan
cycling mode.
Unit Does Not Cool/Heat
On And Off Too Frequently
(continued).
Check the cooling capacity of your unit to
ensure it is properly sized for the room in which
it is installed. Room air conditioners are not
designed to cool multiple rooms.
cooling capacity to match the heat
gain of the room.
Check the heating capacity of your unit. Air
conditioners are sized to meet the cooling load,
and heater size is then selected to meet the
heating load. In extreme northern climates,
room air conditioners may not be able to be
used as a primary source of heat.
heating capacity to match the heat
loss of the room.
If there are heat producing appliances in use
in the room, or if the room is heavily occupied,
the unit will need to run longer to remove the
additional heat.
This may be due to an excessive
heat load in the room.
Be sure to use exhaust vent fans while cooking
or bathing and, if possible, try not to use heat
producing appliances during the hottest part of
the day.
It may also be due to an improperly
sized unit.
your new air conditioner may result in the
unit running longer than you feel it should.
This may be more apparent, if it replaced an
This may be normal for higher
Unit Runs Too Much.
compared to older models.
You may notice that the discharge
air temperature of your new air
conditioner may not seem as cold
as you may be accustomed to from
older units. This does not, however,
indicate a reduction in the cooling
capacity of the unit.
capacity rating (Btu/h) listed on the unit’s rating
33
COOlING ONlY ROOM AIR CONDITIONERs: TROUBlEsHOOTING TIPs
Problem
Possible Cause
Low voltage
Possible Solution
Check voltage at compressor. 115V & 230V
units will operate at 10% voltage variance
Temperature not set cold enough or
room air thermistor inoperative
Set temperature to lower than ambient
temperature. Test thermistor and replace
if inoperative.
Compressor hums but cuts off on
overload
Hard start compressor. Direct test compressor.
If compressor starts, add starting components
Compressor
does not run
Open or shorted compressor
windings
Check for continuity & resistance
Open overload
Test overload protector & replace if inoperative
Test capacitor & replace if inoperative
Test for continuity in all positions. Replace if
inoperative
Open capacitor
Inoperative system button
Refer to appropriate wiring diagrams to check
wiring. Correct as needed.
Broken, loose or incorrect wiring
Problem
Possible Cause
Inoperative system button
Broken, loose or incorrect wiring
Open capacitor
Possible Solution
Test button & replace user interface if inoperative
Refer to applicable wiring diagram. Repair.
Test capacitor & replace if inoperative
Fan motor
does not run
Fan speed button defective.
Replace user interface if inoperative
Test fan motor & replace if inoperative (be sure
internal overload has had time to reset)
Inoperative fan motor
Problem
Possible Cause
Possible Solution
Undersized unit
Refer to industry standard sizing chart
Indoor ambient thermistor open
or shorted.
See alarms. Replace thermistor if necessary.
Dirty filter
Clean as recommended in Owner’s Manual
Use pressure wash or biodegradable cleaning
agent to clean
Does not cool or
only cools slightly
Dirty or restricted condenser or
evaporator coil
Poor air circulation
Adjust discharge louvers. Use high fan speed
Low capacity - undercharge
Check for leak & make repair
Check amperage draw against nameplate. If
not conclusive, make pressure test
Compressor not pumping properly
34
COOlING ONlY ROOM AIR CONDITIONERs: TROUBlEsHOOTING TIPs
Problem
Possible Cause
Overload inoperative. Opens too
soon
Possible Solution
Check operation of unit. Replace overload if
system operation is satisfactory
Compressor restarted before
system pressures equalized
Control board’s default of 3 minutes
delay inoperative. Replace board.
Check voltage with unit operating. Check for
other appliances on circuit. Air conditioner
should be in a dedicated circuit with proper
voltage & fused separately
Compressor runs
for short periods
only. Cycles on
overload
Low or fluctuating voltage
Incorrect wiring
Refer to appropriate wiring diagram
Test capacitor and replace as needed.
Shorted or incorrect capacitor
Restricted or low air flow through
Check for proper fan speed or blocked
coils. Correct as needed.
condenser coil or evaporator coil
Check for kinked discharge line or restricted
Compressor running abnormally
hot
condenser. Refrigerant overcharge.
Check amperage, connections.
Problem
Possible Cause
Possible Solution
Check power supply, LCD I plug, wire
connection.
No power
Unit does not
turn on
Incorrect wiring
Refer to appropriate wiring diagram
Defective thermistor
Replace thermistor or electronic control board
Possible Solution
Problem
Possible Cause
Poorly installed
Refer to Installation Manual for proper
installation
Fan blade striking chassis
Reposition - adjust motor mount
Check that compressor grommets have not
deteriorated. Check that compressor mounting
parts are not missing
Noisy operation
Compressor vibrating
Improperly mounted or loose
cabinet parts
Check assembly & parts for looseness,
rubbing & rattling
Problem
Possible Cause
Possible Solution
Evaporator drain pan overflowing
Clean obstructed drain trough
Evaporator drain pan broken or cracked.
Reseal or replace. No chassis gasket installed.
Install chassis gasket
Condensation forming underneath
base pan
Poor installation resulting in rain
entering the room
Check installation instructions. Reseal as
required
Water leaks into
the room
Dirty evaporator coil. Use pressure wash
or biodegradable cleaning agent to clean.
Environmental phenomena: point supply
louvers upward. Put fan on high.
Condensation on discharge grille
louvers
Chassis gasket not installed
Downward slope of unit is too
steep inward
Install gasket, per Installation manual
Refer to installation manual for proper
installation
35
COOlING ONlY ROOM AIR CONDITIONERs: TROUBlEsHOOTING TIPs
Problem
Possible Cause
Sublimation:
Possible Solution
Ensure that foam gaskets are installed in
between window panes & in between the
unit & the sleeve. Also, ensure that fresh
air/exhaust vents (on applicable models) are in
the closed position & are in tact
When unconditioned saturated,
outside air mixes with conditioned
air, condensation forms on the
cooler surfaces
Water “spitting”
into room
Follow installation instructions to ensure that
downward pitch of installed unit is no less than
1/4” & no more than 3/8”
Downward pitch of installation is
too steep towards back of unit
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Restricted coil or dirty filter
Problem
Possible Cause
Insufficient air circulation thru area
to be air conditioned
Possible Solution
Adjust louvers for best possible air circulation
Operate in “MoneySaver” position
Advise customer
Excessive
moisture
Oversized unit
Inadequate vapor barrier in building
structure, particularly floors
Problem
Possible Cause
Defective thermistor
Unit oversized
Possible Solution
Replace thermistor or electronic control board
See sizing chart.
Chassis seal gasket not sealing or
absent causing unit to short cycle
Check gasket. Reposition or replace as
needed
Unit short cycles
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Restricted coil or dirty filter
Problem
Possible Cause
Possible Action
Prolonged off
cycles
Defective indoor ambient air thermistor Replace thermistor or electronic control board
Problem
Possible Cause
Evaporator drain pan cracked or
obstructed
Possible Solution
Repair, clean or replace as required
Detach shroud from pan & coil. Clean &
remove old sealer. Reseal, reinstall & check
Use pressure wash or biodegradable cleaning
agent to clean
Water in compressor area
Obstructed condenser coil
Outside water
leaks
Fan blade/slinger ring improperly
positioned
Adjust fan blade to 1/2” of condenser coil fin
pack
36
HEAT/COOl ONlY ROOM AIR CONDITIONERs: TROUBlEsHOOTING TIPs
Problem
Possible Cause
Possible Solution
Bad indoor ambient thermistor
Check error codes. Replace if needed.
Room temperature
uneven
Close doors, windows, etc.
Opened doors, windows, etc.
(Heating cycle)
Problem
Possible Cause
Possible Solution
Incorrect wiring
Refer to appropriate wiring diagram
Bad outdoor coil thermistor or
electronic control board
Check error codes. Replace needed part.
Unit will not
defrost
Ambient temperature will have to
rise above 32 degrees F for frost
to melt
Outdoor temperature below
32 degrees
Problem
Possible Cause
Possible Solution
Dirty filter
Clean as recommended in Owner’s Manual
Check heat rise across coil. If unit operates
efficiently, check if insulation can be added
to attic or walls. If insulation is adequate,
recommend additional unit or larger one
T-stat should close at 38°F. Check continuity
Unit undersized
Outdoor t-stat open (applicable
models)
Does not heat
adequately
of control. If temperature is below 38°F,
replace control
Check for adequate fan air across heater.
Check control for open at 160°F & close at
150°F
Heater hi-limit control cycling on &
off
Shorted supplementary heater
Incorrect wiring
Ohmmeter check, approx. 32-35 ohms
Check applicable wiring diagram
37
HEAT PUMP TROUBlEsHOOTING
Problem
Possible Cause
Incorrect wiring
Possible Solution
Refer to applicable wiring diagram
Check for continuity of coil
Defective solenoid coil
Block condenser coil & switch unit to cooling.
Allow pressure to build up in system, then
switch to heating. If valve fails to shift, replace
valve.
Unit cools when
heat is called for
Reversing valve fails to shift
Defective electronic control board
Replace electronic control board
Problem
Possible Cause
Heating capillary tube partially
restricted
Possible Solution
Check for partially starved outer coil. Replace
heating capillary tube
Switch unit several times from heating to
cooling. Check temperature rise across
coil. Refer to specifi cation sheet for correct
temperature rise
Heating
insufficient
Check valve leaking internally
Deenergize solenoid coil, raise head pressure,
energize solenoid to break loose. If valve fails
to make complete shift, replace valve.
Reversing valve failing to shift
completely; bypassing hot gas
38
TROUBlEsHOOTING CHART - COOlING
REFRIGERANT SYSTEM DIAGNOSIS COOLING
PROBLEM
PROBLEM
PROBLEM
PROBLEM
LOW SUCTION PRESSURE
HIGH SUCTION PRESSURE
LOW HEAD PRESSURE
HIGH HEAD PRESSURE
Low Load Conditions
High Load Conditions
Low Load Conditions
High Load Conditions
Low Air Flow Across
Indoor Coil
High Air Flow Across
Indoor Coil
Refrigerant System
Restriction
Low Air Flow Across
Outdoor Coil
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Reversing Valve not
Fully Seated
Overcharged
Undercharged
Overcharged
Non-Condensables (air)
Undercharged System
Defective Compressor
Moisture in System
Defective Compressor
TROUBlEsHOOTING CHART - HEATING (HEAT PUMP)
REFRIGERANT SYSTEM DIAGNOSIS HEATING
PROBLEM
PROBLEM
PROBLEM
PROBLEM
LOW SUCTION PRESSURE
HIGH SUCTION PRESSURE
LOW HEAD PRESSURE
HIGH HEAD PRESSURE
Low Air Flow Across
Outdoor Coil
Outdoor Ambient Too High
for Operation in Heating
Refrigerant System
Restriction
Outdoor Ambient Too High
For Operation In Heating
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Reversing Valve not
Fully Seated
Low Air Flow Across
Indoor Coil
Undercharged
Overcharged
Undercharged
Overcharged
Non-Condensables (air)
in System
Moisture in System
Defective Compressor
Defective Compressor
39
ElECTRICAl TROUBlEsHOOTING CHART - HEAT PUMP
CAUTION
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
Failure to do so could result in serious injury
or death.
Failure to do so could result in minor to
moderate injury.
HEAT PUMP
SYSTEM COOLS WHEN
HEATING IS DESIRED.
Is Line Voltage
Present at the
Solenoid Valve?
Is the Selector Switch
Set for Heat?
NO
NO
YES
Is the Solenoid Coil Good?
Replace the Solenoid Coil
YES
Reversing Valve Stuck
Replace the Reversing Valve
40
TROUBlEsHOOTING TOUCH TEsT CHART: TO sERVICE REVERsING VAlVEs
NORMAL FUNCTION OF VALVE
NOTES:
VALVE
OPERATING
CONDITION
* TEMPERATURE OF VALVE BODY
** WARMER THAN VALVE BODY
1
2
3
4
5
6
POSSIBLE CAUSES
CORRECTIONS
Cool
as (2)
Hot
as (1)
Hot
Cool
*TVB
TVB
Normal Cooling
Normal Heating
Hot
as (1)
Cool
as (2)
Hot
Cool
*TVB
TVB
MALFUNCTION OF VALVE
No voltage to coil.
Repair electrical circuit.
Check Electrical circuit and coil
Check refrigeration charge
Defective coil.
Replace coil.
Low charge.
Repair leak, recharge system.
Recheck system.
Pressure differential too high.
Deenergize solenoid, raise head pressure,
reenergize solenoid to break dirt loose.
If unsuccessful, remove valve, wash
out. Check on air before installing. If no
movement, replace valve, add strainer to
discharge tube, mount valve horizontally.
Valve will not
shift from cool
to heat.
Cool,
as (2)
Hot,
as (1)
Hot
Cool
*TVB
Hot
Pilot valve okay. Dirt in one bleeder hole.
Stop unit. After pressures equalize, restart
with solenoid energized. If valve shifts,
reattempt with compressor running. If still
no shift, replace valve.
Piston cup leak
Cool,
as (2)
Hot,
as (1)
Raise head pressure, operate solenoid to
free. If still no shift, replace valve.
Hot
Hot
Cool
Cool
*TVB
Hot
*TVB
Hot
Clogged pilot tubes.
Raise head pressure, operate solenoid
to free
partially clogged port. If still no shift,
replace
valve.
Valve will not
shift from cool
to heat.
Cool,
as (2)
Hot,
as (1)
Both ports of pilot open. (Back seat port
did not close).
Cool,
as (2)
Hot,
as (1)
Warm
Hot
Cool
*TVB
*TVB
Warm
Hot
Defective Compressor.
Replace compressor
Not enough pressure differential at start
of stroke or not enough fl ow to maintain and charge. Raise head pressure. If no
Check unit for correct operating pressures
Warm
Warm
Hot
pressure differential.
shift, use valve with smaller port.
Body damage.
Replace valve
Starts to shift
but does not
complete
Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.
Hot
Hot
Warm
Hot
Warm
Hot
Hot
Hot
Hot
Hot
Hot
Both ports of pilot open.
Body damage.
*TVB
Replace valve
Valve hung up at mid-stroke. Pumping
volume of compressor not suffi cient to
maintain reversal.
reversal.
Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.
Raise head pressure, operate solenoid.
Hot
Hot
Hot
Hot
Hot
Hot
Both ports of pilot open.
If no
shift, replace valve.
Hot,
as (1)
Cool,
as (2)
Operate valve several times, then recheck.
If excessive leak, replace valve.
Apparent
leap in heat-
ing.
Hot
Hot
Hot
Cool
Cool
Cool
*TVB
**WVB
*TVB
*TVB
**WVB
*TVB
Piston needle on end of slide leaking.
Pilot needle and piston needle leaking.
Pressure differential too high.
Clogged pilot tube.
Hot,
as (1)
Cool,
as (2)
Operate valve several times, then recheck.
If excessive leak, replace valve.
Hot,
as (1)
Cool,
as (2)
Stop unit. Will reverse during equalization
period. Recheck system
Raise head pressure, operate solenoid to
free dirt. If still no shift, replace valve.
Raise head pressure, operate solenoid.
Remove valve and wash out. Check on air
before reinstalling, if no movement, replace
valve. Add strainer to discharge tube.
Mount valve horizontally.
Hot,
as (1)
Cool,
as (2)
Hot
Hot
Cool
Cool
Hot
Hot
*TVB
*TVB
Dirt in bleeder hole.
Piston cup leak.
Will not shift
from heat to
cool.
Stop unit. After pressures equalize, restart
with solenoid deenergized. If valve shifts,
reattempt with compressor running. If it
still will not reverse while running, replace
the valve.
Hot,
as (1)
Cool,
as (2)
1
Hot,
as (1)
Cool,
as (2)
Hot
Cool
Cool
Hot
Hot
Defective pilot.
Replace valve.
Warm,
as (1)
Cool,
as (2)
Warm
Warm
*TVB
Defective compressor.
Replace compressor
41
wAllMAsTER wIRING DIAGRAM
ElECTRONIC CONTROl
COOl ONlY MODEls
42
wAllMAsTER wIRING DIAGRAM
ElECTRONIC CONTROl
COOl wITH ElECTRIC HEAT MODEls
43
wAllMAsTER wIRING DIAGRAM
ElECTRONIC CONTROl
HEAT PUMP wITH ElECTRIC HEAT MODEls
44
Installation Accessories
DK / Drain Kit
SB / Sub Base
IDK / Internal Drain Kit
New construction applications where
a condensate drain system has been
built into the wall interior.
Installed at the back of the unit and allows
for attachment to permanent condensate
disposal system, if disposal is necessary
or desired.
Used as a base for the unit when
it is desired to place the cord and
receptacle within the installation, or
simply as a base for the unit when
mounted low in the wall.
Necessary when installing in a sleeve
deeper than 16 3/4" deep, such as
Fedders B sleeve (19 3/4" deep).
163
FeddersB
193
Exterior Grilles
CORRECT Vertical Louvers
IMPORTANT:
Operating the air
conditioner with incorrect
Adapter Kit (on 19 3/4”
deep sleeve) will recirculate
discharge air and cause
compressor overload to trip.
INCORRECT Horizontal Louvers
WSD Sleeve
WSD Sleeve
Standard Grille
45
INSTALLATION INSTRUCTIONS
FOR “WSD” SLEEVE
MOUNTING HARDWARE PROVIDED
ITEM
DESCRIPTION
QTY.
NO.
1
SCREW, #12A X 2”
5
WALL PREPARATION:
STEP 1 The wall opening required for a “WSD” SLEEVE is 17 1/4” high by 27 1/4” wide.
STEP 2 LINTELS must be used in opening of brick veneer and masonry walls to support the material above the “WSD”
SLEEVE. The following considerations should also be given:
A. Adjustable SUB-BASE SB–89 or other unit support must be provided for panel wall type construction
and for walls less than 8” thick.
B. A minimum distance of 1” must be allowed on all sides of the unit to adjacent wall and floor. Where the
sub–base is required, the minimum distance from the floor to the sleeve must be 3 1/2”. To minimize
chances of short cycling of the compressor, the minimum clearance between the ceiling and the top of
the unit should be 24”. (See Figure 1).
FIGURE 1
MINIMUM OF 24” REQUIRED
FROM TOP OF UNIT TO CEILING.
INSIDE
WALL
LINTELS
WSD SLEEVE
MINIMUM OF 1”
SPACING REQUIRED
ON ALL SIDES OF
THE UNIT.
DRAIN
1” MINIMUM
EXTENSION
3 1/2” FOR
SUBBASE
9/16” MINIMUM
OUTSIDE WALL
46
INSTALLATION REQUIREMENTS:
STEP 1 The “WSD” SLEEVE should be positioned so that the DRAIN EXTENSION extends a minimum of 9/16” beyond the
OUTSIDE WALL (See Figure 1).
STEP 2 The “WSD” SLEEVE must extend a minimum of 7/8” beyond the INSIDE WALL.
STEP 3 The “WSD” SLEEVE must be installed level side to side.
STEP 4 The “WSD” SLEEVE must also be installed with a downward tilt toward the outside of the building. If a level is placed
so that it rests on the FRONT and BACK UNIT REST as shown in Figure 2, a properly installed unit provides a 1/2
bubble slope to the outside of the building.
CAUTION: SLEEVE projections and leveling precautions must be observed to prevent the entry of water into the room.
FIGURE 2
RAISED LEDGE
BACK UNIT REST
LEVEL
FRONT UNIT REST
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
SLEEVE INSTALLATION:
STEP 1
After unpacking the “WSD” SLEEVE from the carton, remove the corrugated FRONT PANEL.
For immediate installation of sleeve and chassis (skip if installing chassis into sleeve at a later date):
Remove the rear WEATHER PANEL. Reverse grille and place lower edge into sleeve tab (Friedrich logo facing
out). Align slots with screw holes. Secure grille with screws.
Place “WSD” SLEEVE in the wall opening following the instructions given in the INSTALLATION REQUIRE-
MENTS section. Attach the SLEEVE to the INSIDE WALL by driving two #12A x 2” screws in each side of the
SLEEVE (see Figure 1.). Shim at the top of the SLEEVE, midway between the sides. Drive one #12A x 2” screw
in the top of the sleeve, close to the shim. Install screws from inside the SLEEVE. If the wall opening is not
framed with wood, use expansion anchor bolts or molly (toggle) bolts (not provided).
STEP 2
Once the SLEEVE has been installed, check the LEVEL again to be sure the 1/2 bubble downward tilt is main-
tained. Apply shims, if required, to maintain the proper slope.
STEP 3
STEP 4
Caulk the perimeter of the entire opening on the inside and the outside between the SLEEVE and the WALL.
The corrugated front panel removed in Step 1 above must be remounted back in place if masonry work is to be
done and/or if the “WSD” CHASSIS is to be installed at a later date.
47
INSTALLATION INSTRUCTIONS
FOR BAFFLE ADAPTER KIT (BAK)
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
48
WallMaster® Thru-the-Wall
SEALING GASKET INSTALLATION INSTRUCTIONS
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
Remove the black rubber gasket from the air discharge plenum of the air conditioner (see fig. A). Look inside the wall sleeve and
check to see if a black rubber gasket is already in place along the bottom front (see fig. B). If one is not in place, thoroughly clean
the sleeve area between the front unit rests and the raised ledge (see fig. B). Once this area is clean and completely dry, peel the
orange backing from the gasket and apply it to the base of the sleeve (see fig. B). Once the gasket has been properly applied, the
sleeve is ready for the air conditioner to be installed per the installation instructons.
FIGURE A
AIR DISCHARGE PLENUM
FIGURE B
SIDE PROFILE
RAISED LEDGE
OF WALL SLEEVE
GASKET
FRONT UNIT REST
49
INSTALLATION INSTRUCTIONS
FOR INTERNAL DRAIN KIT (IDK)
Apply Sealer to
the bottom of
the Drain Plate
Wall Sleeve
Drill a .625”
diameter
hole here
0.5” In
from edge
Sleeve
Base
4.75” From
back of
basepan
Drill a .625”
diameter
hole in the
bottom of
Dimple
the basepan
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
1.
2.
3.
4.
DRILL A .625” DIAMETER HOLE IN THE BOTTOM OF THE SLEEVE BASE TO THE
DIMENSIONS SHOWN.
APPLY A SILICONE TYPE OF SEALER TO THE OUTSIDE BOTTOM EDGES OF THE
DRAIN PLATE.
INSERT THE DRAIN TUBE INTO THE HOLE AND PRESS THE DRAIN PLATE DOWN TO
FORM A WATERTIGHT SEAL AGAINST THE SLEEVE BASE.
DRILLA .625” DIAMETER HOLE IN THE BOTTOM OF THE BASE PAN AS SHOWN IN THE
ILLUSTRATION. THIS HOLE ALLOWS CONDENSATE TO ENTER THE WALL SLEEVE
WHERE IT TRAVELS TO THE DRAIN KIT FOR DISPOSAL.
50
WallMaster DRAIN KIT (DK)
ASSEMBLY & INSTALLATION INSTRUCTIONS
WARNING
WARNING
CUT/SEVER HAZARD
EXCESSIVE WEIGHT HAZARD
Use two people to lift or carry the unit,
and wear proper protective clothing.
Failure to do so may result in serious
personal injury.
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
51
INSTALLATION INSTRUCTIONS
SUBBASE FOR WS, WE & WY MODELS
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
D
D
52
INSTALLATION INSTRUCTIONS
ARCHITECTURAL GRILLE MODEL AG
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
D
D
D
53
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.
54
Friedrich Air Conditioning Company
P.O. Box 1540
San Antonio, TX 78295
210.357.4400
WALLMASTER£
THRU-THE-WALL AIR CONDITIONERS
LIMITED WARRANTY
FIRST YEAR
ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from
date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible
for service. Any additional labor cost for removing inaccessible units and/or charges for mileage related to travel by a Service
Agency that exceeds 25 miles one way will be the responsibility of the owner. This remedy is expressly agreed to be the exclusive
remedy within twelve months from the date of the original purchase.
SECOND THROUGH FIFTH YEAR
SEALED REFRIGERANT SYSTEM: If the Sealed Refrigeration System (defined for this purpose as the compressor, condenser
coil, evaporator coil, reversing valve, check valve, capillary, filter drier, and all interconnecting tubing) supplied by FRIEDRICH in
your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase,
FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will
not pay the cost of diagnosis of the problem, removal, freight charges, and transportation of the air conditioner to and from the
Service Agency, and the reinstallation charges associated with repair of the Sealed Refrigeration System. All such cost will be the
sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the
original purchase.
APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District
of Columbia, and Canada. This warranty is not applicable to:
1. Air filters or fuses.
2. Products on which the model and serial numbers have been removed.
3. Products which have defects or damage which results from improper installation, wiring, electrical current
characteristics, or maintenance; or caused by accident, misuse or abuse, fire, flood, alterations and/or misapplication
of the product and/or units installed in a corrosive atmosphere, default or delay in performance caused by war,
government restrictions or restraints, strikes, material shortages beyond the control of FRIEDRICH, or acts of God.
OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service
Organization in your area. They are listed in the Yellow Pages. If assistance is required in obtaining warranty performance, write
to: Room Air Conditioner Service Manager, Friedrich Air Conditioning Co., P.O. Box 1540, San Antonio, TX 78295-1540.
LIMITATIONS:
THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty
notwithstanding, ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY
SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND
EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR
IMPLIED WARRANTY.
Performance of Friedrich’s Warranty obligation is limited to one of the following methods:
1. Repair of the unit
2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.
3. Providing a replacement unit of equal value
The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning.
NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of
consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you.
OTHER: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.
All service calls for explaining the operation of this product will be the sole responsibility of the consumer.
All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to
repairs being made.
(10-08)
55
TECHNICAL SUPPORT
CONTACT INFORMATION
FRIEDRICH AIR CONDITIONING CO.
Post Office Box 1540 · San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212
(210) 357-4400 · 877-599-5665 x 846 · FAX (210) 357-4490
Email: [email protected]
Printed in the U.S.A.
56
NOTEs
NOTEs
FRIEDRICH AIR CONDITIONING CO.
Post Office Box 1540 · San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212
(210) 357-4400 · FAX (210) 357-4490
WM-ServMan (4-10)
Printed in the U.S.A.
|