Evaporator unit electrical control system operation
The wiring diagrams which follow illustrate the circuitry of Follett icemakers used with ice dispensers. Both normal
operation of the icemaker (Stages 1 – 6) and non-normal diagnostic sequences showing torque out (Stages 7 – 9)
for use in troubleshooting icemaker problems are shown.
Normal operation – Stage 1 – Start-up
Power is supplied to L1 on the control boards. The ice level control in the storage bin is closed completing the
circuit between the terminals of the low voltage bin signal connection*. The control boards will now go through the
start-up sequence. Less than 30 seconds will elapse as the water sensor located in the float reservoir checks for
water in the reservoir. The Bin Empty LED (B-E) will be on.
*The high voltage bin signal connection is used on all Follett ice dispenser applications. The high voltage terminals
respond to applied voltage of 24 to 240 volts from the dispenser.
BLACK
WHITE
3
1
4
2
BLACK
START
RELAY
3
YELLOW
GEAR MOTOR
RUN
BLUE
START
YELLOW
WHITE
B
6
9
4
7
A
Solenoid Valve
RED
BLUE
SIGNAL
BIN
SWITCH
BLACK
POWER
ELECTRICAL BOX
SWITCH
GEAR MOTOR
4
2
RUN
BLACK
YELLOW
BLUE
YELLOW
START
RELAY
3
START
WHITE
115 VAC
60 HZ
BLACK
WHITE
GREEN
x
WHITE
BLACK
9
B
7
A
WHITE
BLUE
PURPLE
WHITE
3
6
1
4
WHITE
BLACK
BLACK
WHITE
CORD
SIGNAL
BLACK
BIN
WHITE
RED
RED
WATER
COMPRESSOR
SENSOR
SWITCH
RESET
BIN LOW V
COMP
FAN
DRV
HP SW
COMP
HIGH VOLTAGE BIN
L1
L2
WTR PROBE
WTR PROBE
BIN LOW V
FAN
DRV
L2
COMP
L1
60M
HIGH VOLTAGE BIN
COMP
HP SW
B-T
WTR
2ND
B-E
PWR
RESET
DR
20M
C
60M
B-T
WTR
2ND
B-E
PWR
DR
20M
C
17
