Hoshizaki DBF-40SAC, Service Manual

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19
Electrical
(13) Abnormal noise - Unplug the unit immediately
Possible Cause Remedy
1. Blocked condenser fan. 1. Unblock.
2. Agitator motor and condenser fan
motor resonating.
2. Tighten mounting screws of agitator motor and condenser
fan motor to prevent resonance. Fix resonating parts.
3. Aged agitator motor bearing. 3. Replace agitator motor (ensure proper installation and
wiring).
4. Water flowing (draining) sound in water
tank.
4. Fill water tank with cooling water.
(14) Burning smell - Unplug the unit immediately
Possible Cause Remedy
1. Burnt out agitator motor. 1-1 Check for power supply voltage of 216 to 254V
1-2 Check for inadequate rotation and replace agitator motor
(ensure proper installation and wiring).
2. Overheated or burnt out condenser fan
motor.
2-1 Check for power supply voltage of 216 to 254V.
2-2 If fan is blocked, unblock and check fan for proper
movement. If burnt out, replace condenser fan motor.
(15) After unit is turned on, refrigeration circuit clicks every 3 - 5 minutes
Condenser fan motor is running, but beer is not cold
Possible Cause Remedy
1. Defective compressor. 1. If compressor is locked, replace.
2. Overload relay damaged by voltage
drop.
2. Do not share power supply, but use separate power supply.
3. Power supply was turned off and
turned back on immediately.
3. Wait a few minutes with power on. Check refrigeration
circuit for proper operation.
(Wait at least 5 minutes to restart unit.)
(16) Main power supply earth leakage circuit breaker trips
Possible Cause Remedy
1. Electric leak by dust or moisture on
control terminals.
1. Remove dust or moisture and make proper earth
connection.
2. Disconnected wiring or bad contact. 2. Wire properly.
3. Agitator motor winding insulation
failure.
3. Replace agitator motor.
4. Condenser fan motor winding
insulation failure.
4. Replace condenser fan motor.
5. Compressor winding insulation failure. 5. Replace compressor.