Ice Machine Operational And Diagnostic Sequences - Follett Symphony Plus C/E12CI425A-LI 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 1–8) 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 .
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 .
T.O.L.
RED
Start
Relay
4
3 2
YELLOW BLACK
R
S
C
Gearmotor
A B C D
Water Sensors
22 E12CI425A 230 V 50 Hz, C12CI425A 220 V 60 Hz
R
S
C
Compressor
2
1
Start
Relay
5
Compressor
Electrical Box
WHITE
Drain Fill
Valve Valve
Bin T-Stat
Fan
WHITE
N
N
P15
L1
BLACK
L1
HI PRS
RED
P6
P21
P20
BROWN
P19
BLACK
P3
WATER LEVELS
P22
BLUE
P4
AUGER
High
Pressure
Switch
POWER
LOW BIN
MAKING ICE
SLEEP CYCLE
TIME DELAY
LOW WATER
1 2 3 4 5 6 7 8
MAINTENANCE
RESET
SERVICE
HI AMPS
HI PRESSURE
P11
BIN
CLEANER FULL
Clean Switch