Hoshizaki KM-280MAH, Service Manual

Page: 37 / 58

37
PROBLEM POSSIBLE CAUSE REMEDY
[1] Icemaker will a) Bin Control 1. Set too cold. 1. Adjust warmer.
not stop when Thermostat 2. Defective. 2. Replace.
bin is filled
with ice.
For mechanical
bin control
see “II. 3. [c]”
[2] Abnormal a) Pump Motor 1. Bearings worn out. 1. Replace.
noise b) Fan Motor 1. Bearings worn out. 1. Replace.
2. Fan blade deformed. 2. Replace fan blade.
3. Fan blade does not move 3. Replace.
freely.
c) Compressor 1. Bearings worn out, or 1. Replace.
cylinder valve broken.
2. Mounting pad out of
2. Reinstall
position.
d) Refrigerant Lines 1. Rub or touch lines or other 1. Replace.
surfaces.
[3] Ice in storage a) Bin Drain 1. Plugged. 1. Clean.
bin often
melts.
PROBLEM POSSIBLE CAUSE REMEDY
[1] Small Cube a) Ice Cube Guide 1. Out of position. 1. Place in position.
Circulated water falls into
bin.
b) See chart 1 - [5], and check water supply line, Water Solenoid Valve, water system,
Pump Motor or Controller Board.
c) Drain Valve
1. Dirty. 1. Clean.
[2] Cloudy or a) See chart 2 - [1] and - [3], and check Float Switch, Water Solenoid Valve,
irregular cube Controller Board, Spray Tubes, water system, refrigerant charge or Expansion
Valve.
b) Spray Guide
1. Dirty. 1. Clean.
c) Water Quality 1. High hardness or contains 1. Install a water filter or
impurities. softener.
4. ABNORMAL ICE
5. OTHERS
PROBLEM POSSIBLE CAUSE REMEDY
[1] Freeze cycle a) See chart 1 - [3], and check dirty Air Filter or Condenser, ambient or water
time is long. temperature, water pressure, Water Regulator or refrigerant charge.
b) See chart 2 - [1], and check Float Switch, Water Solenoid Valve or Controller
Board.
[2] Harvest cycle a) See chart 2 - [2], and check Controller Board, Thermistor, Evaporator, ambient
time is long and/or water temperature, water supply line, Water Solenoid Valve, or Expansion
Valve.
3. LOW ICE PRODUCTION