Hoshizaki KM-1301SAJ/3 Service Manual page 35

No Ice Production - Possible Cause
16 Thermostatic Expansion Valve
17. Liquid Line Valve
18. Fan Motor
19. Water System
2. Low Ice Production
Low Ice Production - Possible Cause
1. Appliance in Freeez-Time
Correction Cycle
1. Evaporator
2. Spray Tubes and/or Spray
Guides
3. Refrigerant Charge
4. Water Supply
5. Control Board
See "II.D. Control Board Check"
6. Thermistor
See "II.G. Thermistor Check"
7. Hot Gas Valve
8. Inlet Water Valve
9. Compressor
10. Liquid Line Valve
11. Thermostatic Expansion Valve
1. Low Water Supply
2. Inlet Water Valve
3. Float Switch
4. Splash Guard
5. Check Valve
6. Control Board
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.
a) See "II.C.Freeze-Time Correction Cycle."
Long Harvest Cycle
a) Scaled up.
a) Dirty.
b) Out of position.
a) Low.
a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 3/8" Nominal ID (10 mm Nominal OD in the EU) water
tubing or equivalent.
d) Too cold.
a) Thermistor connection loose (K3).
b) Defective.
a) Loose, disconnected, or defective.
a) Erratic or closed.
a) Screen or orifice clogged.
a) Inefficient or off.
a) Erratic or open.
a) Defective.
Short Freeze Cycle
a) Water filters clogged.
a) Screen or orifice clogged.
a) Float does not move freely.
b) Defective.
a) Missing or defective.
a) Dirty.
b) Defective.
a) Defective.
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