Ⅴ. Service Diagnosis
A. Diagnosis Chart
Problem
Possible Cause
Remedy
1. Compress will
not
start - no
current
draw.
1. Power Switch
1. "OFF" position.
1. Move to "ON' position.
2. Loose connection.
2. Tighten.
3. Failure.
3. Call electrician.
2. Cord and Plug
1. Defective.
1. Replace.
3. Ground Fault Circuit
interrupter
1. Tripped.
1. Check and reset.
2. Defective.
2. Replace.
4. Voltage
1. Too low.
1. Call electrician.
2. Too hige.
2. Call electrician.
5. Wiring to Control Board
1. Loose connection.
1. Tighten.
2. Faulty.
2. Check continuity
and replace.
6. Transformer
1. Open coil winding.
1. Check continuity
and replace.
7. Control Board
1. Defective.
1. Replace control board.
8. Compressor Overload
1. Defective.
1. Replace.
9. Compressor
1. Open windings.
1. Check continuity
and replace.
10. Relay(Compressor)
1. Bad contacts.
1. Replace.
2. Open coil winding.
2. Check and replace.
2. Compressor
will
not run -
draws
current and
trips
on overload.
1. Voltage
1. Too low.
1. Call electrician.
2. Start Relay
1. Bad contacts.
1. Replace.
2. Open coil winding.
2. Replace.
3. Compressor
1. Locked rotor.
1. Replace.
4. Start Capacitor
1. Defective.
1. Check and replace.
3. Compressor
runs
intermittently
and trips on
overload.
1. Voltage
1. Too low.
1. Call electrician.
2. Too hige.
2. Call electrician.
2. Refrigerant Line or
Component
1. Plugged or restricted.
1. Clean and replace filter
3. Condenser Fan Motor
1. Failed.
1. Replace.
4. Refrigerant
1. Overcharged.
1. Evacuate and recharge
2. Non-condensible
in system
2. Evacuate and recharge
5. Location of Unit
1. Restricted air flow to
condenser.
1. Move unit or increase
ventilation.
Содержание LFT-23H
Страница 1: ...Commercial Upright Refrigerator Freezer Service Manual...
Страница 4: ...1 Specifications A Dimensions 1 LRT 771H LFT 771H...
Страница 5: ...2 LRT 1471H LFT 1471H...
Страница 6: ...3 LRT 72H LFT 72H...
Страница 45: ...3 WIRING DIAGRAM T23R T23F...
Страница 46: ...T49R T49F...
Страница 47: ...T72R T72F...
Страница 63: ...5 ELECTRONIC CONTROL INSTRUCTIONS 5 1 FREEZER CONTROL 5 1 1 HOW TO USE THE DISPLAY PCB PANEL...