Section 6 Electrical System
6-51
DIAGNOSING PROBE CONTROL CIRCUITRY
Ice Machine Cycles Into Harvest Before Water Contact with Probe
1. Disconnect the ice thickness probe from the control board.
2. Bypass the freeze time lock-in feature by moving the ICE/OFF /CLEAN switch to OFF and back to ICE.
3. Wait about 1.5 minutes for water to begin flowing over the evaporator.
4. Monitor the harvest light.
Dual Probe
Single Probe
Monitoring of Harvest Light Correction
The harvest light stays off and the ice machine
remains in the freeze sequence.
The ice thickness probe is causing the malfunction.
The harvest light comes on, and 6-10 seconds later,
ice machine cycles from freeze to harvest.
The control board is causing the malfunction.
SV1572 SV1591
ICE THICKNESS PROBE
CONTROL BOARD
EVAPORATOR
ICE THICKNESS PROBE
CONTROL BOARD
EVAPORATOR
DISCONNECT
PROBE WIRE
DISCONNECT
PROBE WIRE
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