38
38
PROBLEM
POSSIBLE CAUSE
REMEDY
[3] (Continued)
d) Pressure switch,
condenser
thermistor
1. Dirty condenser fins.
1. Clean.
2. Ambient temperature
too warm.
2. Check for recommended
temperature.
3. Fan not rotating.
3. Replace.
4. Condenser water
pressure too low or
off.
4. Check and get recommended
pressure.
5. Water regulating valve
clogged.
5. Clean.
6. Refrigerant
overcharged.
6. Recharge.
7. Refrigerant line or
components plugged.
7. Clean and replace drier.
8. Bad contacts.
8. Check for continuity and
replace.
9. Loose connections.
9. Tighten.
e) Thermostat (water-
cooled model)
1. Ambient temperature
too warm.
1. Check for recommended
temperature.
2. Compressor cooling
fan motor defective.
2. Replace.
3. Bad contacts.
3. Check for continuity and
replace.
4. Loose connections.
4. Tighten.
f) Gear motor protect
relay
1. Coil winding opened. 1. Replace.
2. Bad contacts.
2. Check for continuity and
replace.
[4] Gear motor starts,
but compressor
will not start
or operates
intermittently.
a) X4 relay (controller
board)
1. Bad contacts.
1. Check for continuity and
replace controller board.
2. Coil winding opened. 2. Replace controller board.
b) X6 relay
1. Bad contacts.
1. Check for continuity and
replace X6 relay.
2. Coil winding opened. 2. Replace X6 relay.
c) Compressor
1. Loose connections.
1. Tighten.
2. Motor winding opened
or earthed.
2. Replace.
3. Motor protector
tripped.
3. Find out the cause of overheat
or overcurrent.
d) Power supply
1. Circuit ampacity too
low.
1. Install a larger-sized
conductor.
e) Controller board
1. Defective.
1. Replace.
f) Start capacitor or run
capacitor
1. Defective.
1. Replace.
[5] Gear motor and
compressor start,
but no ice is
produced.
a) Refrigerant line
1. Gas leaks.
1. Check for leaks with a leak
detector. Reweld leak,
replace drier and charge
with refrigerant. The amount
of refrigerant is marked on
nameplate or label.
2. Refrigerant line
clogged.
2. Replace the clogged
component.
