20
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Ice machine operational and diagnostic sequences
The wiring diagrams that follow illustrate the circuitry of Follett ice machines used with 25/50 series ice dispensers .
Both normal operation (stages 1—8) and non-normal diagnostic sequences showing torque-out for use in
troubleshooting are shown .
Circuitry notes
§
Bin signal is contact closure only —
DO NOT SUPPLY POWER .
Note: The operation stage descriptions that follow are based on the unit containing the split-phase gear
motor.
Normal operation – Stage 1
Power is supplied to L1 of the control board, the
POWER LED light begins flashing . The ice level bin thermostat in
the dispenser is closed and calling for ice, supplying contact closure to the control board . The
LOW BIN LED will be
on . The control board will now go through the start-up sequence . The board checks the water sensors (located in
the reservoir) for continuity between the common probe (B) and the high probe (C) . If continuity is not sensed, the
water fill valve (P21) is energized .
5
2
1
Start
Run
Compressor
T.O.L.
MAINTENANCE
LOW WATER
TIME DELAY
SLEEP CYCLE
MAKING ICE
LOW BIN
POWER
SERVICE
HI AMPS
HI PRESSURE
DRAIN CLOG
CLEANER FULL
High
Pressure
Switch
R S
C
Gearmotor
Start
Relay
Start
Relay
N
L1
Fan
A B C D
Water Sensors
RESET
Fill
Valve
Drain
Valve
3
4
2
Bin T-Stat
Clean Switch
Drain Clog Sensor
P6
P21
P20
P19
P3
P22
P4
AUGER
WATER LEVELS
BIN P11
HI PRS
L1
R
S
C
RED
WHITE
WHITE
BLACK
BROWN
BLUE
RED
BLACK
YELLOW
Compressor
Electrical Box
COMPRESSOR
1 2 3 4 5 6 7 8
BLACK
N
P15
Ice Dispense Input
Capacitor
BLACK
YELLOW
OR
NO CONNECT
