Manitowoc QF0400 Technician's Handbook page 166

Speed light is:
after 3 to 5 seconds
On after 3 to 5 seconds and
control board terminates
Freeze cycle
To verify coupling/auger RPM (revolutions per minute):
1. Verify line voltage is within 10% of ice machine
nameplate rating when low RPM is suspected.
2. Verify the gear motor run capacitor is functional.
3. Place identifying mark on coupling.
4. Count coupling revolutions for 2 minutes.
5. Divide coupling revolutions by 2 (example:
31 coupling revolutions ÷ 2 = 15-1/2 RPM).
Minimum revolutions per minute:
 QF0400 = 9 RPM
 QC0700 = 15 RPM
 QF0800 = 15 RPM
 QF2200/QF2300 = 11.6 RPM
Speed Sensor
QF0400
166
On
Off
Cause
This is normal operation.
Replace motor
speed sensor.
Replace control board.
Part Number 80-1230-9 10/10