ICE MERCHANDISER
Installation, Operation and
Maintenance Instructions
1
1/08
N138647
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The Ice Merchandiser utilizes a programmable controller to control the temperature and
defrost settings. The controller, which is located on the facade of the unit, is factory set.
Please see the default settings sheet and separate instructions that are included on the
operation of this controller.
After shutting the door on freezer models, a short amount of time must be allowed before
the door can be reopened. This is due to the tight seal maintained between the door and
the cabinet. Waiting a few moments for the pressure to equalize permits the door to be
opened easily.
A positive defrost is required to remove frost from the coil in freezer models. This is
accomplished by energizing heaters during the defrost cycle that are positioned on the coil
surface. The programmable controller is factory set to allow four defrosts per day.
As the preset defrost time is reached, the controller automatically terminates the
refrigeration process by turning off the condensing unit and unit cooler fan motors, and
energizes the defrost heaters. As the coil temperature increases, the frost begins to melt
producing water which runs down the coil to the unit cooler drain pan and exits through the
drain tube to the vaporizer. After all the frost has been removed and the coil temperature
reaches approximately 50°F [10ºC], the defrost is terminated through the action of the
defrost termination control located on the unit cooler, and the refrigeration process
resumes.
GENERAL MAINTENANCE
PERIODIC CLEANING
WARNING! To avoid electrical shock, disconnect all electrical power to the
merchandiser prior to cleaning
The exterior of the Ice Merchandiser should be wiped with a damp cloth daily. A
commercial grade glass cleaner may be used. Do not use a brush, scouring pad or any
other abrasive material on the painted surfaces.
The interior (and exterior if desired) may be cleaned with a soft cloth and a mild germicidal
detergent. Do not use any ammonia-based products as this may damage electrical
components within the unit. Do not use a brush, scouring pad or any other abrasive
material on the painted surfaces. Care should be taken not to wet any electrical
components, connections or controls.
Monthly cleaning of the condenser will aid the heat transfer characteristics of the
refrigeration system and increase its efficiency. To accomplish this, remove the bottom
facade from the cabinet by removing 2 screws located at the bottom of the facade on each
side. Slide facade down off key slots and pull out to remove. Use a bristle brush to loosen
any dirt particles that are attached to the fins. Use a vacuum cleaner to remove the
loosened particles and other debris. If dirt is noticeable on the fan blades, simply wipe the
blades with a damp cloth. Failure to keep the condenser coil clean and clear of
obstructions could result in temperature loss and damage to the compressor.
All moving parts have been permanently lubricated and will generally require no
maintenance.
3
1/08
N138647
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MAINTENANCE SERVICE AND ANALYSIS GUIDE
MALFUNCTION
POSSIBLE CAUSE
SOLUTION
Compressor will not start -
no hum
1. Service cord unplugged
2. Fuse blown or removed
3. Overload tripped
4. Control stuck open
5. Wiring incorrect
1. Plug in service cord
2. Replace fuse
3. Determine reasons and correct
4. Repair or replace
5. Check wiring against the diagram
Compressor will not start -
hums but trips on overload
protector
1. Improperly wired
1. Check wiring against the diagram
2. Determine reason and correct
3. Determine reason and replace
4. Determine reason, correct or replace
2. Low voltage to unit
3. Starting capacitor defective
4. Relay failing to close
Compressor starts and runs,
but short cycles on overload
protector
1. Low voltage to unit
2. Overload defective
3. Excessive head pressure
1. Determine reason and correct
2. Check current, replace overload protector
3. Check ventilation or restriction in
refrigeration system
4. Compressor hot-return gas hot
4. Check refrigerant charge, fix leak if necessary
Compressor operates long
or continuously
1. Short of refrigerant
2. Control contact stuck
3. Evaporator coil iced
1. Fix leak, add charge
2. Repair or replace
3. Determine cause, defrost manually
4. Restriction in refrigeration system 4. Determine location and remove restriction
5. Dirty condenser
5. Clean condenser
6. Location too warm
6. Ventilate area or change location.
Compressor runs fine, but
short cycles
1. Overload protector
2. Cold control
3. Overcharge
1. Check wiring diagram
2. Differential too close - widen
3. Reduce charge
4. Air in system
5. Undercharge
4. Purge and recharge
5. Fix leak, add refrigerant
Starting capacitor open,
shorted or blown
1. Relay contacts stuck
2. Low voltage to unit
3. Improper relay
1. Clean contacts or replace relay
2. Determine reason and correct
3. Replace
Relay defective or burned out
Refrigerated space too warm
1. Incorrect relay
2. Voltage too high or too low
1. Check and replace
2. Determine reason and correct
1. Control setting too high
2. Refrigerant overcharge
3. Dirty condenser
1. Reset control
2. Purge refrigerant
3. Clean condenser
4. Evaporator coil iced
5. Not operating
4. Determine reason and defrost
5. Determine reason, replace if necessary
Objectionable noise
1. Fan blade hitting fan shroud
2. Tubing rattle
1. Reform or cut away small section of shroud
2. Locate and reform
3. Vibrating fan blade
4. Condenser fan motor rattles
5. General vibration
3. Replace fan blade
4. Check motor bracket mounting, tighten
5. Compressor suspension bolts not loosened
on applicable models - loosen them
6. Replace fan motor
6. Worn fan motor bearings
4
1/08
N138647
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
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