Diagnosing Ice Thickness Control Circuitry - Welbilt Manitowoc NEO UDE0065A Technician's Handbook

DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY

Ice Machine Does Not Cycle Into Harvest when Water
Contacts the Ice Thickness Control Probe
Bypass the freeze time lock-in feature by
Step 1
moving the ON/OFF/WASH switch to OFF and back to ON.
Wait until the water starts to flow over the evaporator.
Clip the jumper wire to the ice thickness probe
Step 2
and any cabinet ground.
Step 2 Jumper wire connected from probe to ground
Monitoring Harvest Light
The harvest light comes on, and
6-10 seconds later, ice machine
cycles from freeze to harvest.
The harvest light comes on but
the ice machine stays in the
freeze sequence.
The harvest light does not
come on.
Disconnect the ice thickness probe from
Step 3
the control board terminal. Clip the jumper wire to the
terminal on the control board and any cabinet ground.
Monitor the harvest light.
Monitoring Harvest Light
The harvest light comes on, and
6-10 seconds later, ice machine
cycles from freeze to harvest.
The harvest light comes on but
the ice machine stays in the
freeze sequence.
The harvest light does not
energize.
160
Step 3 Jumper wire connected from
control board terminal to ground
Part Number 000014797 Rev02 05/19
Correction
The ice thickness control
circuitry is functioning properly.
Do not change any parts.
The ice control circuitry is
functioning properly. The ice
machine is in a six minute
freeze time lock-in. Verify
Step 1 of this procedure was
followed correctly.
Proceed to Step 3.
Correction
The ice thickness probe is
causing the malfunction.
The control circuitry is
functioning properly. The ice
machine is in a six minute
freeze time lock-in (verify step 1
of this procedure was followed
correctly).
The control board is causing the
malfunction.