Hoshizaki STACKABLE CRESCENT CUBER KM-1301SAH-E - Manual (Page 50)

50
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 (10 mm nominal OD)
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. 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 (air-cooled and
remote air-cooled models)
a) Clogged.
5. Condenser (water-cooled model) a) Water temperature out of specification.
6. Control Board
See "IV.B. Control Board Check."
a) Float switch connection loose (K5).
b) Defective.
7. Hot Gas Valve a) Erratic or open.
8. Inlet Water Valve a) Leaking by.
9. Float Switch
See "IV.D. Float Switch Check
and Cleaning."
a) Float does not move freely or defective switch.
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
condenser unit)
a) Not bypassing.
15. Water Regulating Valve
(water-cooled model)
See "IV.F. Adjustment of Water
Regulating Valve."
a) Out of adjustment.