KM-650MAH-E Service manual - Hoshizaki

No Ice Production - Possible Cause
14. Compressor a) Compressor relay/magnetic contactor contacts bad or coil winding
open.
b) Start capacitor or run capacitor defective.
c) Internal protector open.
d) Start relay contacts bad or coil winding open.
e) Compressor defective.
15. Hot Gas Valve a) Closed in harvest cycle.
b) Open in freeze cycle.
16. Thermistor
a) Loose, disconnected, or defective.
See "IV.E. Thermistor Check"
17. Pump Motor a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
d) Mechanical seal worn out.
18. Thermostatic Expansion Valve a) Bulb loose.
b) Operating erratically.
19. Liquid Line Valve
a) Closed in freeze cycle.
(KM-515MAH-E)
b) Open in harvest cycle.
20. Fan Motor a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
21. Water System a) Water leaks causing short freeze time.
2. Freeze-Up
Defrost and clean the icemaker prior to diagnosing freeze-up. See "VI.A. Cleaning and
Sanitizing Instructions." Fill out a freeze-up checklist. The freeze-up checklist can be found
in the Hoshizaki America Technician's Pocket Guide or contact your local distributor for a
copy of the freeze-up checklist.
Freeze-Up - Possible Cause
Harvest Cycle
1. Evaporator a) Scaled up.
b) Damaged.
2. Cube Guides a) Out of position.
b) Damaged.
3. Spray Tubes and/or Spray a) Dirty.
Guides
b) Out of position.
4. Water Supply a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 1/4" Nominal ID (6 mm Nominal OD in the EU) water
tubing or equivalent.
5. Inlet Water Valve a) Screen or orifice clogged.
b) Defective.
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