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3. EVAPORATOR IS FROZEN UP
PROBLEM
POSSIBLE CAUSE
REMEDY
[1] Freeze cycle
time is too long.
a) Float Switch
1. Leads shorted or
defective switch.
1. Check and replace.
2. Float does not move
freely.
2. Clean or replace.
b) Inlet Water Valve
1. Diaphragm does not
close.
1. Check for water leaks
with icemaker off.
Replace if necessary.
c) Control Board
1. Defective.
1. Check and replace.
d) Water Pump
1. RPM too slow.
1. Check and replace.
e) Spray Tubes
1. Clogged.
1. Unclog.
f) Evaporator
1. Scaled up.
1. Clean.
g) Expansion Valve
(KM-80C-HC only)
1. Operating erratically.
1. Check and replace.
[2] All ice formed on
evaporator does
not fall into bin in
harvest cycle.
a) Evaporator
1. Scaled up.
1. Clean.
b) Water Supply Line 1. Water pressure too low.
1. Check and get
recommended pressure.
c) Inlet Water Valve
1. Dirty mesh filter or
orifice.
1. Clean.
2. Diaphragm does not
close.
2. Check for water leaks
with icemaker off.
Replace if necessary.
d) Ambient and/or
water temperature
1. Too cool.
1. Increase temperature.
e) Thermistor
1. Out of position or loose
attachment.
1. See “V. 13.
THERMISTOR”.
f) Control Board
1. Harvest timer is set too
short.
1. Adjust longer, referring
to “II. 3. [e] SERVICE
MODE”.
2. Defective.
2. Check and replace.
[3] Other
a) Spray Tubes
1. Clogged.
1. Clean.
2. Out of position.
2. Place in position.
b) Water System
1. Dirty.
1. Clean.
c) Refrigerant
1. Undercharged.
1. Check for leaks and
recharge.
d) Expansion Valve
(KM-80C-HC only)
1. Bulb out of position or
loose attachment.
1. Place in position.
2. Defective.
2. Replace.
e) Hot Gas Solenoid
Valve
1. Coil winding opened.
1. Replace.
2. Plunger does not move. 2. Replace.
3. Wiring to hot gas valve.
3. Check for loose
connection or open
circuit, and replace.
f) Water Supply Line
1. Too small; requires 9.5
mm OD line dedicated
per machine.
1. Increase water supply
line size.
g) Water Filter
1. Flow rate too small.
1. Replace with filter that
has larger flow rate.
