Ice System Troubleshooting; Installation/Visual Inspection Checklist - Welbilt Multiplex FreshBlender Service Manual

Section 5

ICE SYSTEM TROUBLESHOOTING

• Ask these questions before beginning service:
• When does the ice system malfunction? (Normal
operation, after a cleaning cycle, etc.)
• When do you notice low ice production? (One day a
week, every day, etc.)
• Can you describe exactly what the ice system seems to
be doing?
• Has anyone been working on the ice machine? (Has
anyone turned the switch off on the back of the unit?)
• Is there any reason why incoming water pressure might
rise or drop substantially?
Ice Machine Fault Conditions
LOW WATER SHUTDOWN
If during the ice making cycle the water drops to a point
where the low float switch is open for 5 continuous seconds
the compressor and evaporator gear motor de-energize.
The control board starts a 15 minute time delay and
energizes the SAFETY 2 LED to indicate a time delay is
counting down. After the 15 minute delay the LED will de-
energize and a start -up sequence will initiate.
LOW REFRIGERANT PRESSURE SHUTDOWN
If the low pressure switch is open for more than 5
continuous seconds during the ice making cycle the ice
machine will shut off. The control board starts a 15 minute
time delay and the HARVEST LED energizes to indicate
a time delay. After the 15 minute delay the LED will de-
energize and a start-up sequence will start.
POWER INTERRUPTION
If there is a power interruption during the ice making
cycle or if power is disconnected/reconnected the control
board starts a 15 minute time delay period. The SAFETY 2
LED light flashes to indicate a time delay period. After the
15 minute delay the LED will de-energize and a start-up
sequence will begin.
Part Number REV00 04/08/2020
ROTATION SHUTOFF
During the ice making cycle if the rotation of the gear
motor is out of range for more than 5 seconds, the rotation
sensor will deactivate and stop the gear motor and
compressor. A 15 minute delay will begin and the SAFETY
1 LED and rotational LED will flash. When the delay period
ends the rotational LED and SAFETY 1 LED stop flashing
and the ice machine begins a start-up sequence. After 8
consecutive attempts to restart, the ice machine will remain
off and the SAFETY 1 LED will remain energized. The ice
machine will remain off until main power is disconnected
and reconnected. This will start a 15 minute delay period
after which the ice machine will initiate a start-up sequence.
Ice Chute switch
When the ice chute switch opens during the ice making
cycle for 5 continuous seconds, all outputs are
de-energized for 8 minutes. After the 8 minute delay the ice
machine will go to a startup sequence. The BIN SWITCH LED
will be flashing to indicate a time delay before startup. after
the 15 minute delay period the yellow LED will turn off
Overriding ice machine time delay
In the Service Home > Settings > Ice Maker screen you can
reduce the startup time to as little as 3 minutes. Be sure to
set the default back to 15 minutes when done..

INSTALLATION/VISUAL INSPECTION CHECKLIST

Possible Problem List
Condenser filter is dirty.
Airflow through top half of the
machine is restricted.
Noise from the evaporator
Water filtration is plugged
(if used)
Troubleshooting
Corrective Action List
Clean the condenser filter.
4 inch clearance in back and
18 inch clearance on
top of unit is required.
(See "Store Manager Level" on
page 31)
Clean the ice machine,
excessive operational
noise is normally corrected
by cleaning. Overnight
soaking will be required on
infrequently cleaned machine.
Install a new water filter.
35