Follett MCD425A/W Operation And Service Manual page 20

Self-flushing (when enabled)
At the completion of the 20 minute time delay, the machine checks for a cumulative one hour of ice making time
since the last off-cycle flush . If the cumulative ice making time exceeds one hour, the machine will energize the
drain valve P19 for 60 seconds to drain the evaporator . It will then refill with water, flush again, refill and begin
making ice if the LOW BIN LED is on . If the ice making time is less than 1 hour, the machine will start and begin
making ice without draining the evaporator .
Capacitor
OR
Diagnostic Stages
High gearmotor amps – Stage 1
The HI AMPS error and TIME DELAY LEDs are on indicating that the control board has sensed an over-torque
condition at the P4 terminal (more than 3 amps from the gearmotor) or no current draw (0A) and shut the ice
machine down (strike one) . The HI AMPS and TIME DELAY LEDs will remain on for 60 minutes after an over-
torque condition has occurred . The ice machine will remain off as long as these two LEDs are on . After the
60 minute time delay, these LED lights turn off, and the control board will try to go through a normal start-up
sequence .
Capacitor
OR
YELLOW
20 MCD425A/W, R425A/W, MFD425A/W, P425A/W Ice Machines
T.O.L.
R
S
C
Compressor
2
RED
Start
Relay
5
Compressor
Electrical Box
WHITE
Start
Relay
Drain Fill
4 Valve Valve
3 2
YELLOW BLACK
R
S
C
Gearmotor
A B C D
Drain Clog Sensor
Water Sensors
T.O.L.
R
S
C
Compressor
2
RED
Start
Relay
5
Compressor
Electrical Box
WHITE
Start
Relay
Drain Fill
4
Valve Valve
3 2
BLACK
R
S
C
Gearmotor
A B C D
Drain Clog Sensor
Water Sensors
Fan
1
WHITE
N
L1
L1
RED
P6
P21
P20
BROWN
P19
BLACK
P3
P22
BLUE
AUGER
Bin T-Stat
Fan
1
WHITE
N
N
L1
L1
RED
P6
P21
P20
BROWN
P19
BLACK
P3
P22
BLUE
AUGER
Bin T-Stat
High
Pressure
Switch
POWER
N
P15
LOW BIN
BLACK
MAKING ICE
SLEEP CYCLE
HI PRS
TIME DELAY
LOW WATER
1 2 3 4 5 6 7 8
MAINTENANCE
RESET
SERVICE
HI AMPS
WATER LEVELS
HI PRESSURE
DRAIN CLOG
BIN P11
P4
CLEANER FULL
Clean Switch
High
Pressure
Switch
POWER
P15
LOW BIN
BLACK
MAKING ICE
SLEEP CYCLE
HI PRS
TIME DELAY
1 2 3 4 5 6 7 8 LOW WATER
MAINTENANCE
RESET
SERVICE
HI AMPS
WATER LEVELS
HI PRESSURE
DRAIN CLOG
P11
BIN
P4
CLEANER FULL
Clean Switch