Low Ice Production; Abnormal Ice - Hoshizaki KM-515MAH Service Manual

3. Low Ice Production

Problem
[1] Freeze cycle time is
long.
[2] Harvest cycle time is
long.

4. Abnormal Ice

Problem
[1] Small cubes.
[2] Cloudy or irregular
cubes.
Possible Cause
a) See chart 2.[1] and check float switch, inlet water valve, control board, water
pump, spray tubes, evaporator, and expansion valve.
b) See chart 1.[1] and check dirty air filter or condenser, ambient or water
temperature, refrigerant charge, water pressure, and condenser water
regulating valve (water-cooled model only).
c) Check pump, hot gas valve, headmaster (C.P.R.) (remote air-cooled model
only), expansion valve, refrigeration check valve, and compressor.
a) See chart 2.[2] and check evaporator, water supply line, inlet water valve,
ambient and/or water temperature, line valve (if applicable), thermistor, control
board, and hot gas valve.
Possible Cause
a) Ice Cube Guide
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 or worn.
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
c) Water Quality
1. Out of position.
Circulated water falls
into bin.
1. Dirty.
1. High hardness or
contains impurities.
40
Remedy
Remedy
1. Place in position.
1. Clean or replace.
1. Clean.
1. Install a water softener or
filter.