4. Cabinet inside
temperature
too
high;
compressor
will
not start
1. Compressor Relay
1. Defective. ( 115V to
relay coil.)
1. Check and replace.
2. Circuit Board
1. Defective. ( Compressor
relay coil not
energized
at 115V.)
1. Replace.
Problem
Possible Cause
Remedy
5. Cabinet
temperature too
high.
1. Setpoint
1. Incorrect.
1. Correct setpoint.
Factory defaults :
Freezer -0.4℉(-18℃)
Refrigerator 35℉(2℃)
2. Door
1. Not sealing, or open
for long intervals.
1. Check for sealing,
check for door open
at time of warm
cabinet temperature.
3. Defrost
1. Not enough defrosts
occurring per day.
Operation in humid
conditions.
1. Freezer ; See "C. 1. 5
Defrost System."
2. Refrigerator : "C. 1. 6
Defrost System."
3. Check D-Sensor
position.
4. Refrigerant
1. Leak.
1. Repair leak and
recharge
5. Fan Motor
1. Defective.
1. Check and replace.
6. Condenser
1. Dirty.
1. Clean.
7. S1-Sensor
1. Defective.
1. Check and replace.
8. Control Board
1. Defective.
1. Replace.
6. Cabinet
temperature dis
- play indicator
does not illumi
- nate properly.
1. Board Connection
1. Bad connection
between control board
and display board.
1. Check connection.
2. Display Board
1. Defective.
1. Replace.
3. Control Board
1. Defective.
1. Replace.
7. Cabinet inside
temperature too
low.
1. Sensor
1. Defective.
1. Check and Replace.
2. Compressor Relay
1. Defective;
contacts welded.
1. Replace.
3. Circuit Board
1. Defective.
1. Replace.
8. Evaporator does
1. D-Sensor
1. Defective.
1. Check and replace.
Summary of Contents for LRT-23H
Page 1: ...Commercial Upright Refrigerator Freezer Service Manual ...
Page 4: ...1 Specifications A Dimensions 1 LRT 771H LFT 771H ...
Page 5: ...2 LRT 1471H LFT 1471H ...
Page 6: ...3 LRT 72H LFT 72H ...
Page 45: ...3 WIRING DIAGRAM T23R T23F ...
Page 46: ... T49R T49F ...
Page 47: ... T72R T72F ...
Page 63: ...5 ELECTRONIC CONTROL INSTRUCTIONS 5 1 FREEZER CONTROL 5 1 1 HOW TO USE THE DISPLAY PCB PANEL ...