Hoshizaki IM-240DME Service Manual page 71

2. LOW ICE PRODUCTION
PROBLEM
[1] Freeze cycle
time is too
long.
[2] Takes too long
for Water Pan
to close.
E1CG4880210
CHECK
a) Water Supply to 1. Low pressure.
Condenser
(water-cooled)
b) Ambient or 1. Too high.
Water
Temperature
c) Water Quality 1. High hardness or
2. Lime is deposited inside
d) Refrigerant 1. Overcharged or
Charge
e) Refrigerant 1. Excessive moisture.
Circuit
f) Thermistor, 1. See "II. 2. CONTROLLER BOARD".
Controller Board
g) Air Filter, 1. Clogged.
Condenser
h) Fan Motor 1. Running at half speed
a) Evaporator 1. Scaled up.
2. Defective.
b) Refrigerant 1. Undercharged.
Charge
c) Hot Gas Valve 1. Defective.
d) Thermistor, 1. See "II. 2. CONTROLLER BOARD".
Controller Board
e) Water 1. Clogged.
Regulating
2. Defective.
Valve
f) Fan Motor 1. Runs during defrost
POSSIBLE CAUSE
contains impurities.
Cooling Water Tubing.
undercharged.
continuously (DME/XME
only).
cycle.
67
REMEDY
1. Check for recommended
pressure.
1. Check for recommended
temperatures.
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. Check Bimetal
Thermostat for closed
contacts or Relay X6 for
welded contacts.
1. Clean or remove scale.
Install a water filter or
scale treatment.
2. Replace.
1. Check for leaks and
recharge correctly.
1. Replace.
1. Clean.
2. Repair or replace.
1. Check wiring and
Actuator Toggle Switch.