Hoshizaki FM-300AKE-HC Service Manual page 47

PROBLEM
[3] (Continued)
[4] Gear motor
starts, but
compressor will
not start or
operates
intermittently.
[5] Gear motor and
compressor
start, but no ice
is produced.
POSSIBLE CAUSE
d) Pressure switch,
condenser
thermistor
e) Thermostat
(water-cooled
model)
f) Gear motor
protect relay
a) X4 relay
(controller board)
b) X6 relay
b) Compressor
c) Power supply
d) Controller board
e) Start capacitor or
run capacitor
a) Refrigerant line
1. Dirty condenser fins.
2. Ambient temperature
too warm.
3. Fan not rotating.
4. Condenser water
pressure too low or off.
5. Water regulating valve
clogged.
6. Refrigerant
overcharged.
7. Refrigerant line or
components plugged.
8. Bad contacts.
9. Loose connections.
1. Ambient temperature
too warm.
2. Compressor cooling
fan motor defective.
3. Bad contacts.
4. Loose connections.
1. Coil winding opened.
2. Bad contacts.
1. Bad contacts.
2. Coil winding opened.
1. Bad contacts.
2. Coil winding opened.
1. Loose connections.
2. Motor winding opened
or earthed.
3. Motor protector
tripped.
1. Circuit ampacity too
low.
1. Defective.
1. Defective.
1. Gas leaks.
2. Refrigerant line
clogged.
44
REMEDY
1. Clean.
2. Check for recommended
temperature.
3. Replace.
4. Check and get recommended
pressure.
5. Clean.
6. Recharge.
7. Clean and replace drier.
8. Check for continuity and
replace.
9. Tighten.
1. Check for recommended
temperature.
2. Replace.
3. Check for continuity and
replace.
4. Tighten.
1. Replace.
2. Check for continuity and
replace.
1. Check for continuity and
replace controller board.
2. Replace controller board.
1. Check for continuity and
replace X6 relay.
2. Replace X6 relay.
1. Tighten.
2. Replace.
3. Find out the cause of overheat
or overcurrent.
1. Install a larger-sized
conductor.
1. Replace
1. Replace
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. Replace the clogged
component.