Service Manual

25
K3 Thermistor
Pin # VDC
#1 to #2 5VDC
#1 to #3 5VDC
#2 to #3 0VDC
C
ALP
X1
X4
X3
X2
BC OPEN
BC CLOSED
1 2 3 4 5 6 7 8 9 10
ON
1 2 3 4 5
ON
S4
1
S3
ALARM RESET
OUTPUT TEST
K7
K6
K3
K4
K5
K1
K2
S5
POWER OK
LED 2LED 3
LED 4
LED 1
P/N 2A3792-01
BLACK
RED WHITE
10 9 8 7 6 5 4 3 2 1
S2
1
3
3
2
1
3
1
3
CB
Float Switch
Bin Control
K4 Bin Control
Pin # VDC
#1 to #2 5VDC
#1 to #3 5VDC
#2 to #3 0VDC
K5 Float Switch
Pin # VDC
#1 to #2 1.2VDC
#1 to #3 2VDC
#2 to #3 1.2VDC
Thermistor
4) To verify voltage output from CB to the components, slide the CB K1 connector out far
enough to allow multimeter lead contact. With the icemaker in the cycle to be tested,
check output voltage from the corresponding pin on CB K1 connector to a neutral
(W)wire. If output voltage is not found and the appropriate LED is on, replace CB.
5) Check CB control connectors K3, K4, and K5 for correct VDC per table below.
Note: Pin #1 is DC ground (GND) on each connector.
Legend: CB–control board; CT–control transformer