Manitowoc Ice FLAKE/CHIPLET QF0400 - Manual (Page 56)

Troubleshooting Section 5
5-4 Part No. 80-1214-3
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.
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.
Gear Motor Speed Checklist
Possible Problem List Corrective Action List
Low water pressure Verify water pressure is between 20 and 80 psig.
Defective motor speed sensor Replace motor speed sensor.
Defective motor Replace motor.
Defective coupler Replace coupler.
Defective evaporator/auger assembly Replace evaporator assembly.
Low voltage Verify voltage is within
± 10% of nameplate voltage.
Ice frozen to auger/evaporator Allow evaporator to thaw.
Revised 8/2003