Hoshizaki DCM-271BAH Service Manual page 17

2b) 5VDC CB K8 Connector: See Fig. 2.
Red positive
test lead to red
K4 connector
pin closest
to black K3
connector
Lower Float Switch (LFS) (BU)
2b) 5VDC CB K8 Connector Continued:
a) Bin Control (BC)
CB K8 connector pins #3 (GY) and #4 (GY): When BC is closed (icemaking),
5VDC is present between CB K8 connector pin #3 (GY) and pin #4 (GY) to CB red
K4 connector pin closest to CB black K3 connector. 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 connector pins #5 common (BK), #6 UFS (R), and #7 LFS (BU): 5VDC is
present between CB K8 connector pin #5 common (BK) and CB red K4 connector pin
closest to CB black K3 connector at all times. If 5VDC is not present, replace CB. For
further float switch diagnostics, see "II.E. Float Switch Check and Cleaning."
5VDC CB K8 Connector
Component
Bin Control (BC)
Float Switch (FS) Common #5 (BK) Common
Upper Float Switch (UFS)
Lower Float Switch (LFS)
Red Positive
Test Lead
Float Switch (FS) Common (BK)
Upper Float Switch (UFS) (R)
Fig. 2
17
Pin # (Wire Color)
#3 (GY) and #4 (GY)
#6 (R)
#7 (BU)
Multimeter
5VDC
Black Negative
Test Lead
Bin Control (GY)
Control Board K8 Connector