Service Manual

20
2b) 5VDC CB K8 Connector: See Fig. 2.
a) Bin Control (BC)
CB K8 pin #3 (GY) and #4 (GY): When BC is closed (icemaking), 5VDC is present
between CB K8 pin #3 (GY) and pin#4(GY) to CB K4 pin #1 (pin closest to CB
black K3). If5VDC is not present on either pin, replace CB. If 5VDC is present on
pin#3(GY) and not on pin #4 (GY), BC is open. See "II.D. Bin Control Check."
b) Float Switch (FS): Upper (UFS) and Lower (LFS):
CB K8 pin #5 common (BK), #6 UFS (R), and #7LFS (BU) or (DBU): 5VDC is
present between CB K8 pin #5common (BK) and CB K4 pin #1 (pin closest to CB
black K3) at all times. If 5VDC is not present, replace CB. For further oat switch
diagnostics, see "II.E. Float Switch Check and Cleaning."
5VDC CB K8 Connector
Component Pin # (Wire Color)
Bin Control (BC) #3 (GY) and #4 (GY)
Float Switch (FS) Common #5 (BK) Common
Upper Float Switch (UFS) #6 (R)
Lower Float Switch (LFS) #7 (BU) or (DBU)
Red test lead
to CB K4 pin
#1 (pin closest
to CB black
K3)
Fig. 2
Red Test Lead
Black Test Lead
Multimeter
5VDC
Control Board K8 Connector
Bin Control (GY)
Upper Float Switch (UFS) (R)
Float Switch (FS) Common (BK)
Lower Float Switch (LFS)
(BU) or (DBU)