Welbilt FB081TF, Service Manual

Page: 40 / 96

40 Part Number REV00 04/08/2020
Troubleshooting Section 5
ICE MACHINE TROUBLESHOOTING FLOWCHART
Yes = Continue No = Check Remedy
Ice machine rocker switch in ice position? There is an independent switch for the ice
machine
Move rocker switch to on position, refer to
rocker switch diagnostics
Energized lights on ice machine control
board?
Check for power to 55 & 56 on the ice
machine control board.
Verify connections from BIC master control
relay (MCR)
Delay period expired? Full bin or rocker switch turned off = 8
minute delay
Fault or power interruption = 15 minute
delay
Wait for delay to expire
Bin Level Light on? Ice may be in chute or the switch may not
move freely.
Refer to ice chute diagnostics
Harvest light is off? Attach refrigeration gauges and test run to
check pressure
Below 15 psi locate and repair refrigerant
leak.
Above 15 psi refer to low pressure control
diagnostics
Safety limit 2 light off? No water in reservoir Restore water, test float valve operation
Gear motor energized? Check contactor coil for power, check
contacts, test gear motor
Replace contactor or gear motor
Time delay light on evaporator is solid yellow
after 11 seconds?
Red blinking is 15 minute time delay
Red solid is lockout
Clean ice machine and refer to time delay
operation
Compressor starts when the 11 second time
delay ends?
Check contactor coil for power, check
contacts, test gear motor
Replace contactor or gear motor
HPCO open
Attach refrigeration gauge set and test run
to check pressure.
Clean filter and/or condenser, refer to HPCO
BIC clean in place (CIP) Relay contacts must
be closed
Test CIP relay
Time delay light on evaporator is red Check HPCO, Clean lime scale and minerals
from evaporator and sanitize
Compressor continues to run after 3 minute
fault override period?
Determine which fault is shutting the
machine off
Refer to fault conditions
Ice machine stops on bin switch? Ice machine must stop on full bin Refer to bin switch operation
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.