Hoshizaki MODULAR CRESCENT CUBER KM-650MWH - Manual (Page 37)

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Problem Possible Cause Remedy
[3]Other (continued) g)Water Supply Line 1. Too small; requires
3/8" OD line dedicated
per machine.
1. Increase water line size.
h)Water Filter 1. Flow rate too small. 1. Replace with filter that has
larger flow rate.
3. Low Ice Production
Problem Possible Cause Remedy
[1] Freeze cycle time is
long.
a) See chart 1.[3] and check dirty air filter or condenser, ambient or water
temperature, water pressure, condenser water regulating valve (water-cooled
model), and refrigerant charge.
b) See chart 2.[1] and check float switch, inlet water valve and control board.
c) Check pump, hot gas valve, headmaster (C.P.R.) (remote air-cooled model),
expansion valve, refrigeration check valve, and compressor.
[2] Harvest cycle time is
long.
a) See chart 2.[2] and check control board, thermistor, evaporator, ambient and/or
water temperature, water supply line, inlet water valve, line valve, and gas valve.
4. Abnormal Ice
Problem Possible Cause Remedy
[1] Small cubes. a) Ice Cube Guide 1. Out of position.
Circulated water falls
into bin.
1. Place in position.
b) See chart 1.[5] and check water supply line, inlet water valve, water system,
pump motor, and control board.
c) Pump Out Check Valve 1. Dirty. 1. Clean.
[2] Cloudy or irregular
cubes.
a) See chart 2.[1] and 2.[3], and check float switch, inlet water valve, control
board, spray tubes, water system, refrigerant charge, and expansion valve.
b) Spray Guide 1. Dirty. 1. Clean.
c) Water Quality 1. High hardness or
contains impurities.
1. Install a water softener or
filter.
5. Other
Problem Possible Cause Remedy
[1] Icemaker will not stop
when bin is filled with
ice.
a) Bin Control Thermostat 1. Set too cold. 1. Adjust warmer.
2. Defective. 2. Replace
[2] Abnormal noise . a) Pump Motor 1. Bearings worn out. 1. Replace
b) Fan Motor 1. Bearings worn out. 1. Replace
2. Fan blade deformed. 2. Replace fan blade.
3. Fan blade does not
move freely.
3. Replace.
c) Compressor 1. Bearings worn out or
cylinder valve broken.
1. Replace.