Low Ice Production; Abnormal Ice - Hoshizaki DIM-30DE-1 Service Manual

PROBLEM
[9] Water pan will
not close.

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) See [8] above.
b) Hot gas valve
CHECK
a) Water supply
b) Water
temperature
c) Water quality
d) Refrigerant
charge
e) Refrigerant circuit
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
g) Thermistor,
controller board
a) Water supply line
POSSIBLE CAUSE
1. Defective.
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. Excessive moisture.
1. See "II. 2. CONTROLLER BOARD".
1. Clogged.
1. Scaled up.
1. Undercharged.
1. Defective.
1. See "II. 2. CONTROLLER BOARD".
1. Runs during defrost cycle. 1. Check wiring and actuator
POSSIBLE CAUSE
1. Low pressure.
1. Too high.
1. Clogged.
1. Clogged.
1. Leaks.
1. Undercharged.
1. See "II. 2. CONTROLLER BOARD".
1. Low pressure.
2. Clogged.
25
REMEDY
1. Replace.
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.
toggle switch.
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.