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Problem Possible Cause Remedy
[]
Freeze cycle time is
too long. (continued)
f) Thermistor . Disconnected, loose,
or defective.
. Connect, secure, check.
See "V.L. Removal
and Replacement of
Thermistor."
g) Refrigerant . Low charge. . Check for leaks. Recover,
repair, evacuate, and
recharge.
h) Expansion Valve . Bulb loose. . Secure bulb.
.
Operating erratically. . Check and replace.
i) Control Board . Defective. . See "IV.B. Control Board
Check."
[]
All ice formed on
evaporator does not
fall into bin in harvest
cycle.
a) Evaporator . Scaled up. . Clean.
.
Damaged. .Replace.
b) Ambient and/or Water
Temperature
. Too cool. .Increase temperature.
c) Water Supply Line . Water pressure too
low.
. Check and get
recommended pressure.
d) Water System . Water supply line
too small; requires
3/8" OD line dedicated
per machine.
. Increase water line size.
.
Water lter clogged or
ow rate too small.
. Replace lter or install a
higher ow rate lter.
e) Inlet Water Valve . Dirty mesh lter or
orice.
. Clean.
.
Diaphragm does not
close.
. Check for water leaks with
icemaker off.
f) Spray Tubes . Dirty. . Clean.
.
Out of position. . Place in position.
g) Thermistor . Disconnected, loose,
or defective.
. Connect, secure, check.
See "V.L. Removal
and Replacement of
Thermistor."
h) Hot Gas Valve . Coil winding open. . Replace.
.
Plunger does not
move.
. Replace.
3. Wiring to hot gas
valve.
3. Check for loose
connection or open, and
replace.
i) Expansion Valve . Bulb loose. . Secure bulb.
.
Operating erratically. . Check and replace.
j) Liquid Line Valve
(if applicable)
. Continues to open in
harvest cycle.
. Check operation in harvest
cycle and replace.
k) Control Board . Harvest timer is set
too short.
. Adjust longer, referring to
"II.C.3.b) Harvest Timer
(S4 dip switch & )."
.
Defective. . See "IV.B. Control Board
Check."