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No Ice Production - Possible Cause
15. Compressor
16. Hot Gas Valves (KMS & SRK)
17. Thermistor
See "IV.E. Thermistor Check"
18. Pump Motor
19. Thermostatic Expansion Valve
20. Liquid Line Valves (KMS & SRK) a) Closed in freeze cycle.
21. Fan Motors-Remote
22. Headmaster (C.P.R.)
23. Water System
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 Technician's Pocket Guide or contact your local distributor for a copy of the
freeze-up checklist.
Freeze-Up - Possible Cause
1. Evaporator
2. Cube Guides
3. Spray Tubes and/or Spray
Guides
4. Water Supply
5. Harvest Water Valve
a) Compressor relay/magnetic contactor contacts bad or coil winding
open.
b) Start capacitor or run capacitor defective (single phase only).
c) Internal protector open.
d) Start relay contacts bad or coil winding open (single phase only).
e) Protector tripped.
f) Compressor defective.
a) Closed in harvest cycle.
b) Open in freeze cycle.
a) Loose, disconnected, or defective.
a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
d) Mechanical seal worn out.
a) Bulb loose.
b) Operating erratically.
b) Open in harvest cycle.
a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
a) Defective.
a) Water leaks causing short freeze time.
Harvest Cycle
a) Scaled up.
b) Damaged.
a) Out of position.
b) Damaged.
a) Dirty.
b) Out of position.
a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 3/8" nominal ID copper water tubing or equivalent.
a) Screen or orifice clogged.
b) Defective.
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