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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.
115 VAC
60 HZ
x
GREEN
BLACK
WHITE
WHITE
GEAR MOTOR
GEAR MOTOR
ELECTRICAL BOX
POWER
SWITCH
BLACK
BLACK
WHITE
1
3
4
6
7
9
A
B
BLUE
PURPLE
WHITE
WHITE
1
3
4
6
7
9
A
B
BLUE
RED
Solenoid Valve
WTR PROBE
L1
L2
RESET
COMP
FAN
DRV
BIN LOW V
HP SW
COMP
WTR PROBE
L1
L2
RESET
COMP
FAN
DRV
BIN LOW V
HP SW
COMP
17
PWR
SENSOR
DR
C
COMPRESSOR
20M
SWITCH
60M
2ND
WTR
B-T
B-E
HIGH VOLTAGE BIN
WHITE
PWR
DR
C
20M
60M
2ND
WTR
BIN
SIGNAL
B-T
SWITCH
B-E
HIGH VOLTAGE BIN
WATER
BIN
SIGNAL
CORD
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