Service Manual

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8) Ice Purge Cycle – "GM" LED is on. 5-sec. GM delay timer terminates. GM,
CCR, FM, and EH (-C model) energize. Once CCR energizes, 5VDC circuit closes
through CCR terminal #3 (W/O) and terminal #5 (W/O) and CB K9 #5 (W/O) and
K9 #6 (W/O). After 5VDC circuit closes, 5-min. ice purge timer starts. Tobypass the
5-min. Ice Purge Cycle, press the "SERVICE" button on CB after the "GM" LED turns
on. WARNING! Risk of electric shock. Care should be taken not to touch live
terminals. Diagnosis: If "GM" LED is off, check that UFS closes and WV de-energizes.
IfUFS is closed, 30 sec. has passed, and "GM" LED remains off, replace CB. If"GM"
LED is on and GM is off, check CB K1 #2 (BK) to a neutral (W) for 115VAC. If115VAC is
not present, check 115VAC power supply. If115VAC is present, check CB K1 #3(P) to
a neutral (W). If 115VAC is present on CB K1 #2 (BK) and not on CB K1 #3 (P), replace
CB. If115VAC is present on CB K1#3 (P), check GM fuse, GM internal protector,
GM windings and capacitor, and GM coupling between auger and GM. When GM
energizes, CCR energizes starting 5-min. ice purge timer. If FM does not start, check
FM capacitor, FM windings, and FM bearings.
9) Freeze Cycle – "COMP" and "GM" LEDs are on. The 5-min. ice purge timer
terminates. GM, EH (-C model), CCR, and FM continue. Comp energizes. Ice
production starts 4to 6 min. after Comp energizes depending on ambient and water
conditions. As ice is produced, the water level in the reservoir drops. UFS opens.
Nothing happens at this time. When LFS opens, WV energizes and rell cycle begins,
FZT terminates, and FTstarts.
FZT: 30-Min. Freeze Safety Timer – FZT starts when UFS closes and terminates
when LFS opens. If LFS does not open within 30 min. of UFS closing, CB shuts down
the icemaker and sounds a 5-beep alarm. See "III.A.2.LED Lights and Audible Alarm
Safeties." To reset, turn the power supply off and on again. See "II.F. Diagnostic Tables"
for troubleshooting details.
Icemaker Diagnosis (CCR): 5-min. ice purge timer terminates, CB "COMP" LED is on
and COMP energizes. If not, check for 5VDC between CB K5 connector pin closest
to CB K4 connector and CB K9connector #5(W/O). If 5VDC is not present, replace
CB. If 5VDC is present, check for 5VDC between CB K5 connector pin closest to CB
K4 connector and CB K9connector #6(W/O). If 5VDC is present and CB "Comp"
LED is off (CR or COMP not energized), replace CB. If 5VDC is not present, check for
115VAC between CCR terminal #7(O) to CCR terminal #8(W) for 115VAC. If115VAC
is not present (GM not energized), see step 8 above. If 115VAC is present and CCR
contacts are open (5VDCpresent between terminals #3(W/O) and #5(W/O)), check
CCR solenoid voltage and solenoid continuity. Replace CCR if necessary.
Icemaker Diagnosis (COMP): If"COMP" LED is on and COMP is not energized,
check CB X1 relay BK wire to a neutral (W) and CB X1 relay V wire to a neutral (W) for
115VAC. If115VAC is present on CB X1BK wire and not on CBX1 V wire, replace CB.
If115VAC is present on CBX1V wire and COMP is not energized, check for 115VAC
at CB X1 Comp relay. Check Comp internal overload (motor protector), start relay, and
capacitors.