Hoshizaki KM-320MAH - Manual (Page 31)

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Problem Possible Cause Remedy
d)Pump Motor 1. Motor winding opened. 1. Replace.
2. Bearing worn out.
2. Replace.
3. Wiring to pump motor. 3. Check for loose
connection or open, and
replace.
4. Defective capacitor. 4. Replace.
5. Defective or bound
impeller.
5. Replace and clean.
6. Mechanical seal worn
out.
6. Check and replace.
e)Controller Board 1. Defective. 1. See "II.B.5. Checking the
Controller Board."
[6] Fan motor will
not start, or is not
operating.
a)Fan Motor 1. Motor winding opened. 1. Replace.
2. Bearing worn out.
2. Replace.
3. Wiring to fan motor. 3. Check for loose
connection or open, and
replace.
4. Defective capacitor. 4. Replace.
5. Fan blade bound. 5. Check and replace.
b)Controller Board 1. Defective. 1. See "II.B.5. Checking the
Controller Board."
[7] All components
run, but no ice is
produced.
a)Refrigerant 1. Undercharged. 1. Check for leaks and
recharge.
2. Air or moisture
trapped.
2. Replace drier and
recharge.
b)Compressor 1. Defective valve. 1. Replace.
c) Hot Gas Solenoid Valve 1. Continues to open in
freeze cycle.
1. Check and replace.
d)Line Valve 1. Continues to close in
freeze cycle.
1. Check and replace.
e)Water Supply Line
(water-cooled model)
1. Condenser water
pressure too low or off
and pressure control
opens and closes
frequently.
1. Check and get
recommended pressure.
f) Water Solenoid Valve 1. Water solenoid valve
is wide open during
freeze.
1. Check for water leaks with
icemaker off.
B. Evaporator is Frozen Up
Problem Possible Cause Remedy
[1]Freeze cycle time is
too long.
a)Float Switch 1. Leads short-circuit or
defective switch.
1. Check and replace.
2. Float does not move
freely.
2. Clean or replace.
b)Water Solenoid Valve 1. Diaphragm does not
close.
1. Check for water leaks with
icemaker off.