Manitowoc Chiplet QC0700 Installation, Use & Care Manual page 56

Before Calling Service
Gear Motor Speed
Anytime the motor speed sensor detects the motor
speed (rpm) is below the minimum range for
3 continuous seconds, the ice machine will:
1. De-energize the compressor and/or gear motor.
2. Continuously flash the Gear Motor Speed light.
3. Initiate a 60-minute Standby Mode.
During the Standby Mode the Motor Speed Sensor light
will flash to indicate a Standby Mode.
After the 60-minute Standby Mode, the ice machine will
de-energize the Motor Speed light and initiate a start-up
sequence.
Gear motor speed normal:
The ice machine continues to make ice.
Gear motor speed below minimum range for
3 continuous seconds:
The ice machine will start another 60-minute Standby
Mode.
If the gear motor speed drops below the minimum range
for 3 continuous seconds during 7 consecutive cycles,
the ice machine will initiate a SafeGuard Mode.
Gear Motor Speed Checklist
Possible Problem List
Low water pressure
Defective motor speed sensor
Defective motor
Defective coupler
Defective evaporator/auger assembly
Low voltage
Ice frozen to auger/evaporator
5-4
During the SafeGuard Mode the Motor Speed Sensor
light will continually flash to indicate a SafeGuard Mode.
The ice machine remains off until:
• The toggle switch is moved from OFF to ICE.
• Line voltage is interrupted and restored.
INDICATOR LIGHT
Before 48 hours have elapsed:
After a Standby Mode has been initiated the Gear Motor
Speed light will flash anytime the toggle switch is placed
in the OFF position.
After 48 hours have elapsed:
The SafeGuard will be automatically erased from
memory and the Gear Motor Speed light will not flash.
Corrective Action List
Verify water pressure is between 20 and 80 psig.
Replace motor speed sensor.
Replace motor.
Replace coupler.
Replace evaporator assembly.
Verify voltage is within
± 10% of nameplate voltage.
Allow evaporator to thaw.
Section 5
Part Number 000002688