Hoshizaki IM-21 Service Manual page 96

PROBLEM
[2] (Continued)
[3] Compressor
runs, but other
components
will not start.
[4] Fan Motor will
not run.
[5] Water
continues to be
supplied in
freeze cycle.
[6] Water does not
circulate.
CHECK
b) Water Regulator
(water-cooled)
c) Overload
Protector
d) Starter
e) Start Capacitor
or Run
Capacitor
f) Power Relay
(Magnetic
Contactor for
240ME/WME)
g) Compressor
h) Air Filter,
Condenser
a) Control Circuit
a) Wiring
b) Actuator Toggle
Switch
c) Thermistor,
Controller Board
a) Water Solenoid
Valve
b) Controller Board 1. Defective.
a) Water Supply
Line
b) Water Solenoid
Valve
c) Water System
d) Pump Motor
POSSIBLE CAUSE
3. Condenser water
pressure too low or OFF
(water-cooled).
1. Set too high.
2. Clogged or defective.
1. Bad contacts.
2. Voltage too low.
3. Refrigerant overcharged
or undercharged.
1. Defective.
1. Defective.
1. Bad contacts.
2. Coil winding opened.
1. Wiring to Compressor.
2. Defective.
1. Clogged.
1. Loose connection or
broken wire.
1. Loose connection or
broken wire.
1. Defective.
1. See "II. 2. CONTROLLER BOARD".
1. Diaphragm does not
close.
1. Water pressure too low
and water level in Water
Tank too low.
1. Dirty mesh filter or orifice
and water level in Water
Tank too low.
1. Water leaks.
2. Clogged.
1. Motor winding opened.
2. Bearing worn out.
92
REMEDY
3. Check for recommended
pressure.
1. Adjust lower.
2. Clean or replace.
1. Check for continuity and
replace.
2. Check for recommended
voltage.
3. Recharge.
1. Replace.
1. Replace.
1. Check for continuity and
replace.
2. Replace.
1. Check for loose
connection or open, and
repair or replace.
2. Replace.
1. Clean.
1. Repair or replace.
1. Repair or replace.
1. Replace.
1. Check for water leaks
with icemaker OFF.
1. See "II. 2. CONTROLLER
BOARD".
1. Check for recommended
pressure.
1. Clean.
1. Check connections for
water leaks, and repair.
2. Clean (See "V. 4.
ICEMAKING WATER
SYSTEM").
1. Replace.
2. Replace.