20
12CI400A • 12HI400A
Diagnostic sequence – Stage 7
The 20 minute error LED (20M) is on, indicating that the control board has sensed an over-torque condition
(above 3A on the gearmotor). The 20M LED remains on for 20 minutes after an over-torque condition has
occurred. The ice machine remains off as long as the 20M LED is on. When the 20M LED goes off, the control
board will try to go through a normal start-up sequence. The WTR LED remains on as long as the water
sensor in the float reservoir senses water.
GRD
L1
L1
L2
L2
L2
L2
L2
COMPRESSOR
FAN
DRIVE
DR
C
20M
60M
2ND
WTR
B-T
B-E
RESET
GRD
G
B
W
FAN
BLACK
WHITE
BLACK
BLACK
R
ORANGE
S
S
L
COMPRESSOR
C
RED
BLACK
BLACK
INPUT
POWER
WATER
SENSOR
CONTROL
BOARD
24V
COMMON
LINE
V
A
C
RED
RED
WHI
TE
BLA
CK
BIN T-STAT
BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)
WHITE
RED
WHITE
M
1
COMPRESSOR
SWITCH
PWR
BLACK
T.O.L.
BLACK
RED
HIGH PRESSURE
SAFETY SWITCH
M
WHITE
BLA
CK
BLUE
RELAY
START
T.O.L.
BLACK
4
2
3
YELLOW
GEAR MOTOR
START
RUN
WHI
TE
GRD
L1
L1
L2
L2
L2
L2
L2
COMPRESSOR
FAN
DRIVE
DR
C
20M
60M
2ND
WTR
B-T
B-E
RESET
GRD
G
B
W
FAN
BLACK
WHITE
BLACK
BLACK
R
ORANGE
S
S
L
COMPRESSOR
C
RED
BLACK
BLACK
INPUT
POWER
WATER
SENSOR
CONTROL
BOARD
24V
COMMON
LINE
V
A
C
RED
RED
WHI
TE
BLA
CK
BIN T-STAT
BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)
WHITE
RED
WHITE
M
1
COMPRESSOR
SWITCH
PWR
BLACK
T.O.L.
BLACK
RED
HIGH PRESSURE
SAFETY SWITCH
M
WHITE
BLA
CK
BLUE
RELAY
START
T.O.L.
BLACK
4
2
3
YELLOW
GEAR MOTOR
START
RUN
WHI
TE
Normal operation – Stage 6
When the dwell time of 20 minutes has expired, the B-T LED goes off. The ice machine goes through the
normal start-up sequence when the bin level control signals the control board for ice. The WTR LED will remain
on as long as the water sensor in the float reservoir senses water.