KM1301SAH-E Service Manual - Hoshizaki

3. Low Ice Production
Low Ice Production - Possible Cause
Long Harvest Cycle
1. Evaporator a) Scaled up.
2. Spray Tubes and/or Spray a) Dirty.
Guides
b) Out of position.
3. Refrigerant Charge a) Low.
4. Water Supply a) Low water pressure.
b) External water filters clogged.
c) Insufficient water line size.
Minimum 3/8" nominal ID (10 mm nominal OD)
d) Too cold.
5. Control Board
a) Thermistor connection loose (K3).
See "IV.B. Control Board Check." b) Defective.
6. Thermistor
a) Loose, disconnected, or defective.
See "IV.E. Thermistor Check."
7. Hot Gas Valve a) Erratic or closed.
8. Inlet Water Valve a) Water valve screen clogged.
9. Compressor a) Inefficient or off.
10. Liquid Line Valve (if applicable) a) Erratic or open.
11. Expansion Valve (TXV) a) Defective.
12. Water Regulating Valve a) Leaking by.
(water-cooled model)
Long Freeze Cycle
1. Evaporator a) Scaled up.
2. Refrigerant Charge a) Low.
3. Air Filter (air-cooled model) a) Clogged.
4. Condenser (air-cooled and a) Clogged.
remote air-cooled models)
5. Condenser (water-cooled model) a) Water temperature out of specification.
6. Control Board
a) Float switch connection loose (K5).
See "IV.B. Control Board Check." b) Defective.
7. Hot Gas Valve a) Erratic or open.
8. Inlet Water Valve a) Leaking by.
9. Float Switch
a) Float does not move freely or defective switch.
See "IV.D. Float Switch Check
and Cleaning."
10. Compressor a) Inefficient or off.
11. Pump Motor a) RPM too slow.
12. Liquid Line Valve (if applicable) a) Erratic or closed.
13. Expansion Valve (TXV) a) Bulb loose.
b) Defective.
14. Headmaster (C.P.R.) (remote a) Not bypassing.
condenser unit)
15. Water Regulating Valve a) Out of adjustment.
(water-cooled model)
See "IV.F. Adjustment of Water
Regulating Valve."
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