Low Ice Production; Abnormal Ice; Other - Hoshizaki KM-320MAH Service Manual

C. Low Ice Production
Problem
[1] Freeze cycle time is
long.
[2] Harvest cycle time is
long.
D. Abnormal Ice
Problem
[1] Small cubes.
[2] Cloudy or irregular
cubes.
E. Other
Problem
[1] Icemaker will not stop
when bin is filled with
ice.
[2] Abnormal noise.
[3] Ice in storage bin
often melts.
Possible Cause
a) See chart A.[3] and check dirty air filter or condenser, ambient or water
temperature, water pressure, water regulator, and refrigerant charge.
b) See chart B.[1] and check float switch, water solenoid valve and controller
board.
a) See chart B.[2] and check controller board, thermistor, evaporator, ambient
and/or water temperature, water supply line, water solenoid valve, line valve,
and gas valve.
Possible Cause
a) Ice Cube Guide
b) See chart A.[5] and check water supply line, water solenoid valve, water
system, pump motor, and controller board.
c) Drain Valve
a) See chart B.[1] and B.[3], and check float switch, water solenoid valve,
controller board, spray tubes, water system, refrigerant charge, and expansion
valve.
b) Spray Guide
c) Water Quality
Possible Cause
a) Bin Control Thermostat 1. Set too cold.
a) Pump Motor
b) Fan Motor
c) Compressor
d) Refrigerant Lines
a) Bin Drain
b) Icemaker and Bin
1. Out of position.
Circulated water falls
into bin.
1. Dirty.
1. Dirty.
1. High hardness or
contains impurities.
2. Defective.
1. Bearings worn out.
1. Bearings worn out.
2. Fan blade deformed.
3. Fan blade does not
move freely.
1. Bearings worn out or
cylinder valve broken.
2. Mounting pad out of
position.
1. Rub or touch other
lines or surfaces.
1. Plugged.
1. Drains not run
separately.
33
Remedy
Remedy
1. Place in position.
1. Clean.
1. Clean.
1. Install a water softener or
filter.
Remedy
1. Adjust warmer.
2. Replace
1. Replace
1. Replace
2. Replace fan blade.
3. Replace.
1. Replace.
2. Reinstall.
1. Replace.
1. Clean.
1. Separate the drain lines.