Filter
Top Products
27
•IcemakingControlCircuit:TheicemakingcontrolcircuitconsistsofWCR,CS,and
BC. The icemaking control circuit activates once UF/S closes. Once CB reads a
closed circuit through WCR, CS, and BC, CB then starts the 60-sec. ice purge cycle
(GM operation). Once UF/S closes, WCR energizes, closing contacts between WCR
terminals #4 (GY wire) and #6 (O wire). CS must be in the "ICE" position (O wires).
BC proximity switch must be closed (O and V wires) to complete the icemaking circuit
between CB K4 connector pin #3(GYwire) and #4(Vwire). Diagnosis: Conrm UF/S
has closed and WCR energizes. Next, check for 5VDC from CBK4 connector pin
#3(GY wire) and CB K4 connector pin #4(Vwire) to CB K3 connector pin #1 (open).
If 5VDC is not present on CB K4 connector pin #3 (GY wire) or pin #4 (V wire), replace
CB. If 5VDC is present on one and not the other, check continuity on WCR terminals
#4and #6, CS, and BC.
•FreezeProtectCircuit(GMPR):Once60-sec.icepurgecyclestarts,GMand
GMPR energize, closing GMPR pins #3 (BR wire) and #5 (DBU wire). CB circuit
K2connector pin #1(DBU wire) and #2 (BR wire) is now closed. Once 60-sec. ice
purge timer terminates, CB energizes Comp. If this circuit is open, Comp cannot
energize. Diagnosis: Check for 5VDC at CB K2 connector pin #1 (DBU wire) and
CB K2connector pin #2(BR wire) to CB K3 connector pin #1(open). If 5VDC is not
present on either pin, replace CB. If 5VDC is present on one and not the other, conrm
GMPR is energized and terminals #3 and #5 contacts are closed. If 5VDC is present on
both, once 60-sec. ice purge timer terminates, Comp and FM start. If not, replace CB.
•IceDispenseControls:
a) Push Button Model – "DM" and "AM" LEDs are on: Ice Dispense Switch, Dispense
Mode Switch ("CONTINUOUS" or "PORTION")–When the ice dispense mode switch
is pressed, "DM" LED is on. Circuit is closed between CB K4 connector pin #6(BK
wire) and #8 (BK wire) to #7 (GY wire) or #5 (P wire) depending on dispense mode
switch ("CONTINUOUS" or "PORTION"). Diagnosis: Check for 5VDC from CB
K4connector pin #6 (BK wire) or pin #8 (BK wire) to CB K3 connector pin #1(open).
If 5VDC is not present, replace CB. If 5VDC is present, press and hold the ice
dispense button. DS and DM should energize. If not, check for 115VAC at CB K2
connector pin #6 (LBU wire) to a neutral (W wire). If 115VAC is not present, check
as outlined below. If 115VAC is present, check DS, DM winding, and DM auger for
binding.
(1) "CONTINUOUS" Mode: Engage the ice dispense button, then check for 5VDC
from CB K4 connector to pin #5 (P wire) to CB K3 connector pin #1 (open). If
5VDC is not present, check ice dispense switch and DMS continuity.
(2) "PORTION" Mode: Engage the ice dispense button, then check for 5VDC from
CB K4 connector pin #7 (GY wire) to CB K3 connector pin #1 (open). If 5VDC is
not present, check the ice dispense switch and DMS continuity.