Hoshizaki KM-350MWJ Service Manual page 24

a) Bin Full Diagnosis: Place an object 5" to 7" (127 to 178 mm) away from the BC
sensor lens. If shut down cycle does not start, confirm BC controller green "LED 1"
LED turns off. If not, check for 4VDC at CB K4 pin #1 (R) to CB K4 pin #2 (BK).
If 1VDC is present, confirm object placement. If object placement is correct, replace
BC sensor and BC controller. If BC controller green "LED 1" LED turns off and CB
yellow "BC OPEN/CLOSED" LED does not turn on and 4VDC is present at CB K4
pin #1 (R) to CB K4 pin #2 (BK), replace CB. If CB yellow "BC OPEN/CLOSED" LED
turns on and shut down cycle does not start, see "II.B.1.4) 1-min. Fill Cycle."
Control Board K4 Bin Control Connector
Bin Full (open)
Pin # Wire Color
#1 to #2
#1 to #3
#2 to #3
6) Once the icemaker restarts, move the control switch to the "OFF" position, then turn off
the power supply.
7) Replace the base cover and right side panel in their correct positions.
8) Move the control switch to the "ON" position. Replace the front panel in its correct
position, then turn on the power supply to start the automatic icemaking process.
Legend: BC–bin control; CB–control board; CT–control transformer
ALARM RESET
VDC
R to BK 4VDC
R to W 1VDC
BK to W 5VDC
K2
1 2 3
OUTPUT TEST
CB
Bin Control
ON
1 2 3 4 5
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