16
Icemaker operational and diagnostic sequences
The wiring diagrams that follow illustrate the circuitry of Follett icemakers 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 115V, 60Hz.
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.
GRD
L1
L1
L2
L2
L2
L2
L2
COMPRESSOR
FAN
DRIVE
DR
C
20M
60M
2ND
WTR
B-T
B-E
RESET
X
GRD
G
B
W
FAN
BLACK
WHITE
BLACK
BLACK
R
ORANGE
S
S
L
COMPRESSOR
C
RED
BLACK
BLACK
WHITE
INPUT
POWER
WATER
SENSOR
CONTROL
BOARD
B
LA
CK
GEARMOTOR
2
4V
COMMON
LINE V
A
C
RED
RED
WHITE
BLA
C
K
BIN T-STAT
BIN SIGNAL
FROM DISPENSER
JUNCTION BOX
WHITE
RED
WHITE
M
1
COMPRESSOR
SWITCH
PWR
BLACK
T.O.L.
BLACK
RED
HIGH PRESSURE
SAFETY SWITCH
4
2
3
RUN
START
T.O.L.
B
LUE
YELLOW
BLACK
WHITE
M
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.
