Low Ice Production; Abnormal Ice - Hoshizaki DIM-40DE-HC Service Manual

2. LOW ICE PRODUCTION

PROBLEM
[1] Freeze cycle
time is too
long.
[2] Takes too long
for water pan
to close.

3. ABNORMAL ICE

PROBLEM
[1] Large hole
cubes.
[2] Cloudy cubes.
CHECK
a) Water supply
b) Water
temperature
c) Water quality
d) Refrigerant
charge
e) Refrigerant circuit 1. Excessive moisture.
f) Thermistor,
controller board
g) Air filter,
condenser
a) Evaporator
b) Refrigerant
charge
c) Hot gas valve
d) Thermistor,
controller board
e) Fan motor
CHECK
a) Water supply line
b) Ambient or water
temperature
c) Air filter,
condenser
d) Water valve
e) Pump motor
f) Refrigerant charge 1. Undercharged.
g) Thermistor,
controller board
a) Water supply line
b) Water quality
c) Water valve
d) Water system
e) Water plate
POSSIBLE CAUSE
1. Low pressure.
1. Too high.
1. High hardness or contains
impurities.
2. Lime is deposited inside
cooling water tubing.
1. Overcharged or
undercharged.
1. See "II. CONTROLLER BOARD".
1. Clogged.
1. Scaled up.
1. Undercharged.
1. Defective.
1. See "II. CONTROLLER BOARD".
1. Runs during defrost cycle. 1. Check wiring.
POSSIBLE CAUSE
1. Low pressure.
1. Too high.
1. Clogged.
1. Clogged.
1. Leaks.
1. See "II. CONTROLLER BOARD".
1. Low pressure.
2. Clogged.
1. High hardness or contains
impurities.
2. Lime is deposited inside
cooling water tubing.
1. Clogged.
1. Scaled up.
1. Jet hole clogged.
50
REMEDY
1. Check for recommended
pressure.
1. Check for recommended
water temperature.
1. Install a water filter or
scale treatment.
2. Clean.
1. Recharge correctly and
check for leaks.
1. Replace drier and
recharge correctly.
1. Clean.
1. Clean or remove scale.
1. Check for leaks and
recharge correctly.
1. Replace.
REMEDY
1. Check for recommended
pressure.
1. Check for recommended
temperatures.
1. Clean.
1. Clean.
1. Repair or replace.
1. Check for leaks and
recharge correctly.
1. Check for recommended
pressure.
2. Check strainer and clean.
1. Install a water filter or
scale treatment.
2. Clean.
1. Clean.
1. Clean or remove scale.
1. Clean.