Service Manual

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d) DV Diagnosis: X10 Relay: If 115VAC is present at CB K1 #1 (V) to neutral (W) and
DV is de-energized, check for 115VAC at X10 relay #5 (V) and #3 (Y) to neutral (W).
If115VAC is present at #5 (V) and not at #3 (Y), conrm X10 relay is de-energized.
Ifde-energized, replace X10 relay (sticking contacts). If energized, conrm
LEDs 1, 2, and 3 are on. If LED 1, 3, and 2 are on and X10 relay is energized,
replace CB.
X13 Relay: Next, If 115VAC is present at X10 #3 (Y) to neutral (W), check for 115VAC
at X13 #6 (Y) and #2 (W/BK) to neutral (W). If 115VAC is not present on #6(Y),
check wiring from X10 relay #3 (Y). If 115VAC is present at X6 (Y) and not at
#2 (W/BK), conrm X13 is de-energized. If energized, conrm CB LEDs 1, 2, and
3 are on. If LEDs 1, 2, and 3 are on and X13 relay is energized, X12 relay must
be energized also. Replace CB. If 115VAC is present at X13 #2 (W/BK), check for
115VAC at X11 relay #3 (W/BK).
X11 Relay: Check for 115VAC at X11 relay #3 (W/BK). If 115VAC is not present check
wiring connections from X13 relay #2 (W/BK). If 115VAC is present at X11 #3 (W/
BK), check for 115VAC at X11 #5 (W/BU) to neutral (W). If 115VAC is present at X11
#3 (W/BK) and not at #5 (W/BU), conrm 115VAC from X11relay #8 (DBU) to #7
(W). If115VAC is present, replace X11 relay (sticking contacts). If 115VAC is present
at X11 relay #5 (W/BU) and DV is de-energized, check wiring to DV from X11 relay
#5 (W/BU), DV coil continuity, make sure the drain line is not clogged and that DV is
clean and operating properly.
8)Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above.
Note: Appliance continues to cycle until BC is satised or power is switched off. The
appliance always restarts at the 1-min. ll cycle.
2. Shutdown Diagnosis
When the appliance is running, hold ice in contact with the thermostatic bulb. BC switch
opens within 10 sec., shutting down the appliance. BC is factory set, and generally
no adjustment is required. However, adjustment may be needed in some conditions,
particularly at higher altitude locations. Diagnosis: See "II.E. Bin Control Check." CB red
K4 connector must have the jumper in place. When the jumper is in place, the green "BC
CLOSED" LED remains on. If the jumper is not in place, yellow "BC OPEN" LED turns
on and the icemaker turns off and remains off until the jumper is replaced in its original
position.
3. Freeze-Time Correction Cycle Diagnosis
1) See "II.C. Freeze-Time Correction Cycle (90 min.).""
Legend: BC–bin control; CB–control board; Comp–compressor; CT–control transformer;
CV–cleaning valve; DV–drain valve; FMRs–fan motor remote;
FS–oat switch; HGVs–hot gas valve; HM–headmaster (C.P.R.);
HPS–high-pressure switch; LLVs–liquid line valve; MC–magnetic contactor:
MT–main transformer; PM–pump motor; TXV–thermostatic expansion valve;
WV1–ll/re-ll water valve; WV2–harvest water valve