Low Ice Production; Abnormal Ice; Others - Hoshizaki KM-280MAF-E Service Manual

3. LOW ICE PRODUCTION

PROBLEM
[1] Freeze cycle a) See chart 1 - [3], and check dirty Air Filter or Condenser, ambient or water
time is long.
b) See chart 2 - [1], and check Float Switch, Water Solenoid Valve or Controller
[2] Harvest cycle a) See chart 2 - [2], and check Controller Board, Thermistor, Evaporator, ambient
time is long

4. ABNORMAL ICE

PROBLEM
[1] Small Cube a) Ice Cube Guide
b) See chart 1 - [5], and check water supply line, Water Solenoid Valve, water system,
Pump Motor or Controller Board.
c) Pump out Check Valve 1. Dirty.
[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
b) Spray Guide
c) Water Quality

5. OTHERS

PROBLEM
[1] Icemaker will a) Bin Control
not stop when Thermostat
bin is filled
with ice.
[2] Abnormal a) Pump Motor
noise b) Fan Motor
c) Compressor
d) Refrigerant Lines
[3] Ice in storage a) Bin Drain
bin often b) Ice machine and Bin
melts. Drain
POSSIBLE CAUSE
temperature, water pressure, Water Regulator or refrigerant charge.
Board.
and/or water temperature, water supply line, Water Solenoid Valve, or Expansion
Valve.
POSSIBLE CAUSE
1. Out of position.
Valve.
1. Dirty.
1. High hardness or contains
POSSIBLE CAUSE
1. Set too cold.
2. Defective.
1. Bearings worn out.
1. Bearings worn out.
2. Fan blade deformed.
3. Fan blade does not move
1. Bearings worn out, or
2. Mounting pad out of
1. Rub or touch lines or other
1. Plugged.
1. Drains not run separately.
Circulated water falls into
bin.
impurities.
freely.
cylinder valve broken.
position.
surfaces.
60
REMEDY
REMEDY
1. Place in position.
1. Clean.
1. Clean.
1. Install a water filter or
softener.
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.