Hoshizaki DCM-270BAH Service Manual page 27

No Ice Production - Possible Cause
1. Control Board
2. Start Relay
3. Start Capacitor
4. Compressor
5. High-Pressure Switch Activates
6. Fan Motor
7. Evaporator
8. Thermostatic Expansion Valve
(TXV)
9. Refrigerant Charge
10. Drain Valve
11. Water System
1. Water Supply
2. Control Board
3. Float Switch
4. Inlet Water Valve
1. Bin Control
2. Control Board
Freeze Cycle
a) No power to compressor delay relay circuit (5VDC) or not
reading circuit.
b) Compressor relay defective
a) Defective.
a) Defective.
a) Internal protector.
b) Motor winding.
c) Mechanical failure.
a) Dirty condenser.
b) Ambient temperature too warm.
c) Fan motor not operating.
d) Refrigerant overcharged.
e) Defective.
f) Refrigerant lines or components restricted.
a) Capacitor defective.
b) Motor winding.
c) Bearing worn out or locked rotor.
a) Dirty.
b) Damaged or defective.
a) Bulb loose.
b) Operating erratically.
a) Low.
a) Dirty, leaking by.
b) Defective coil.
c) Defective control board.
a) Water leaks.
Refill
a) Off.
a) No power to float switch (5VDC) or not reading float switch
condition.
b) No power to inlet water valve (24VAC).
a) Float does not move freely.
b) Defective.
a) Clogged or defective.
Shutdown
a) Large balance plate sticking.
b) Microswitch defective.
a) Defective.
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