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No Ice Production - Possible Cause
16. Thermostatic Expansion Valve
17. Liquid Line Valve
18. Fan Motor
19. Water System
2. Freeze-Up
Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist.
See "II.J. Freeze Up Check List," the Hoshizaki America 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. Inlet Water Valve
6. Float Switch
See "II.F. Float Switch Check and
Cleaning"
7. Refrigerant Charge
8. Control Board
See "III.C. Settings and
Adjustments" and "II.D. Control
Board Check"
9. Bin Control
See "II.E. Bin Control Check"
10. Thermistor
See "II.G. Thermistor Check"
11. Thermostatic Expansion Valve
12. Hot Gas Valve
13. Liquid Line Valve
a) Bulb loose.
b) Operating erratically.
a) Closed in freeze cycle.
b) Open in harvest cycle.
a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
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 1/4" Nominal ID (6 mm Nominal OD in the EU) copper
water tubing or equivalent.
a) Screen or orifice clogged.
b) Defective.
a) Dirty, sticking.
b) Defective.
a) Low.
a) Harvest timer (S4 dip switch 1 & 2) set too short.
b) Harvest pump timer (S4 dip switch 7) not in factory default position.
c) Defective.
a) Actuator does not move freely, sticking.
b) Defective.
a) Loose, disconnected, or defective.
a) Defective.
a) Closed or restricted.
a) Open.
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