Manitowoc Ice QF0800, QF2300, QC0700 Troubleshooting, Section, Gear Motor Speed Checklist

Troubleshooting Section 5

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

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.

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.

5-4 Revised 8/2003 Part No. 80-1214-3