Service Manual

29
No Ice Production - Possible Cause
15. Thermostatic Expansion Valve
(KM-161 B_J Models)
a) Bulb loose.
b) Operating erratically.
16. Fan Motor a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
1 7. Water System a) Water leaks causing short freeze time.
2. Freeze-Up
Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist.
See "II.I. 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
Harvest Cycle
1. Evaporator a) Scaled up.
b) Damaged.
2. Cube Guides a) Out of position.
b) Damaged.
3. Spray Tubes and/or Spray
Guides
a) Dirty.
b) Out of position.
4. Water Supply a) Low water pressure.
b) External water lters clogged.
c) Insufficient water line size.
Minimum 1/4" Nominal ID (6 mm Nominal OD in the EU) copper
water tubing or equivalent.
5. Inlet Water Valve a) Screen or orice clogged.
b) Defective.
6. Float Switch
See "II.E. Float Switch Check
and Cleaning"
a) Dirty, sticking.
b) Defective.
7. Refrigerant Charge a) Low.
8. Control Board
See "III.C. Settings and
Adjustments" and "II.C. Control
Board Check"
a) Harvest timer (S1 dip switch 1 & 2) set too short.
b) Harvest pump timer (S1 dip switch 7) not in factory default position.
c) Defective.
9. Bin Control
See "II.D. Bin Control Check"
a) Actuator does not move freely.
10. Thermistor
See "II.F. Thermistor Check"
a) Loose, disconnected, or defective.
11. Thermostatic Expansion Valve
(KM-161 B_J Models)
a) Defective.
12. Hot Gas Valve a) Closed or restricted.