Manitowoc QY0374A User Manual

Electrical System Section 6
6-48 Part No. 80-1100-3
DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY
Ice Machine Does Not Cycle Into Harvest When Water Contacts The Ice Thickness Control Probe
Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait
until the water starts to flow over the evaporator.
Step 2 Clip the jumper wire leads to the ice thickness probe and any cabinet ground.
Figure 6-22. Step 2
Step 3 Disconnect the ice thickness probe from the control board at terminal 1C. Clip the jumper wire leads to
terminal 1C on the control board and any cabinet ground. Monitor the harvest light.
Figure 6-23. Step 3
Step 2 Jumper wire connected from probe to ground
Monitoring of Harvest Light Correction
The harvest light comes on, and 6-10 seconds later, ice
machine cycles from freeze to harvest.
The ice thickness control circuitry is functioning properly. Do
not change any parts.
The harvest light comes on but the ice machine stays in the
freeze sequence.
The ice thickness 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 harvest light does not come on. Proceed to Step 3, below.
Step 3 Jumper wire connected from control board terminal 1C to ground
Monitoring of Harvest Light Correction
The harvest light comes on, and 6-10 seconds later, ice
machine cycles from freeze to harvest.
The ice thickness probe is causing the malfunction.
The harvest light comes on but the ice machine stays in the
freeze sequence.
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 harvest light does not come on. The control board is causing the malfunction.
SV1588ASV3010
EVAPORATOR
ICE THICKNESS PROBE
GROUND
JUMPER WIRE
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
SV3011 SV1588G
GROUND
JUMPER WIRE
1C
EVAPORATOR
ICE THICKNESS PROBE
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT

Manitowoc QY0374A Specifications

General

Brand	Manitowoc
Model	QY0374A
Category	Ice Maker
Language	English