Ice Machine Operational And Diagnostic Sequences; Circuitry Notes - Follett 12CI400A-LI Installation, Operation And Service Manual

Ice machine operational and diagnostic sequences

The wiring diagrams that follow illustrate the circuitry of Follett ice machines used with 12 series ice dispensers.
Both normal operation (stages 1 - 6) and non-normal diagnostic sequences showing torque-out (stages 7 - 10)
for use in troubleshooting are shown.

Circuitry notes

§ Compressor switch should read open in ON position.
§ Compressor start relay is position sensitive. See label on start relay for proper orientation.
§ Bin signal is 115 V, 60 Hz.
§ Flashing water LED at any time indicates that water signal to board has been lost for more than one second.
§ Ten-second delay: There is a 10 second delay in reaction to loss of water (WTR) or bin (B-E) signals. If signals
are not lost for more than 10 seconds, no reaction will occur.
Normal operation – Stage 1
Power is supplied to L1 of the control board. The ice level control in the dispenser is closed and calling for ice,
supplying signal voltage to the control board. The control board 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) and power LED (PWR) will be on.
INPUT
POWER
G
B
W
COMPRESSOR
C
T.O.L.
RED
START
RELAY
4
WHITE
12CI400A • 12HI400A
GRD
FAN
BLACK
BLACK
M
BLACK
R 1
M
ORANGE
S L
S
BLACK
HIGH PRESSURE
SAFETY SWITCH
GEAR MOTOR
START
2
BLACK
3
YELLOW RUN
T.O.L.
WATER
SENSOR
GRD
L1
L1
WHITE
L2
L2
L2
WHITE
L2
L2
RED
COMPRESSOR
BLACK
FAN
DRIVE
BLACK
BLACK
PWR
RESET
DR
C
20M
CONTROL
BOARD 60M
2ND
WTR
B-T
B-E
RED
RED
COMPRESSOR
SWITCH
BIN SIGNAL
FROM DISPENSER
BIN T-STAT
JUNCTION BOX
(MCD400A/WVS series –
blk wire is on 24V)
17