Ice Machine Troubleshooting Flowchart; Control Board Test Mode - Welbilt Multiplex FreshBlender Service Manual

Troubleshooting

ICE MACHINE TROUBLESHOOTING FLOWCHART

Yes = Continue
Ice machine rocker switch in ice position?
Energized lights on ice machine control
board?
Delay period expired?
Bin Level Light on?
Harvest light is off?
Safety limit 2 light off?
Gear motor energized?
Time delay light on evaporator is solid yellow
after 11 seconds?
Compressor starts when the 11 second time
delay ends?
Compressor continues to run after 3 minute
fault override period?
Ice machine stops on bin switch?

Control Board Test Mode

A. Place the rocker switch in the OFF position.
B. Press the control board TEST button for 3 seconds.
C. The gear motor starts and 3 seconds later the
compressor starts.
D. All LEDS and relays energize for 30 seconds, then
de-energize.
E. Moving the rocker switch to the ice position will
initiate a start-up sequence without a time delay
period. This method can be used to bypass the
time delay.
40
No = Check
There is an independent switch for the ice
machine
Check for power to 55 & 56 on the ice
machine control board.
Full bin or rocker switch turned off = 8
minute delay
Fault or power interruption = 15 minute
delay
Ice may be in chute or the switch may not
move freely.
Attach refrigeration gauges and test run to
check pressure
No water in reservoir
Check contactor coil for power, check
contacts, test gear motor
Red blinking is 15 minute time delay
Red solid is lockout
Check contactor coil for power, check
contacts, test gear motor
HPCO open
Attach refrigeration gauge set and test run
to check pressure.
BIC clean in place (CIP) Relay contacts must
be closed
Time delay light on evaporator is red
Determine which fault is shutting the
machine off
Ice machine must stop on full bin
Remedy
Move rocker switch to on position, refer to
rocker switch diagnostics
Verify connections from BIC master control
relay (MCR)
Wait for delay to expire
Refer to ice chute diagnostics
Below 15 psi locate and repair refrigerant
leak.
Above 15 psi refer to low pressure control
diagnostics
Restore water, test float valve operation
Replace contactor or gear motor
Clean ice machine and refer to time delay
operation
Replace contactor or gear motor
Clean filter and/or condenser, refer to HPCO
Test CIP relay
Check HPCO, Clean lime scale and minerals
from evaporator and sanitize
Refer to fault conditions
Refer to bin switch operation
Part Number REV00 04/08/2020
Section 5