Hoshizaki KM-1601SAH/3 - Manual (Page 66)

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Freeze Up - Possible Cause
7. Inlet Water Valve a) Leaking by.
8. Float Switch
See "IV.D. Float Switch Check
and Cleaning."
a) Float does not move freely.
b) Defective.
9. Pump Motor a) RPM too slow.
b) Impeller damaged.
10. Thermostatic Expansion Valve
(TXV)
a) Defective.
11. Headmaster (C.P.R.) (remote
condenser unit)
a) Defective.
12. Water Regulating Valve
(water-cooled model)
See "IV.F. Adjustment of Water
Regulating Valve."
a) Out of adjustment.
3. Low Ice Production
Low Ice Production - Possible Cause
Long Harvest Cycle
1. Evaporator a) Scaled up.
2. Spray Tubes and/or Spray
Guides
a) Dirty.
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 copper water tubing or equivalent.
d) Too cold.
5. Control Board
See "IV.B. Control Board Check."
a) Thermistor connection loose (K3).
b) Defective.
6. Thermistor
See "IV.E. Thermistor Check."
a) Loose, disconnected, or defective.
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. Thermostatic Expansion Valve
(TXV)
a) Defective.
12. Water Regulating Valve
(water-cooled model)
a) Leaking by.
Long Freeze Cycle
1. Evaporator a) Scaled up.
2. Refrigerant Charge a) Low.
3. Air Filter (air-cooled model) a) Clogged.
4. Condenser a) Clogged.
5. Condenser (water-cooled model) a) Water temperature out of specification.