Manitowoc RNS0244 Technician's Handbook page 134

2. CPU light does not flash
• Defective control board
3. In time delay mode and bin is not full
• Shuttle is jammed or damaged
• Thermostat is out of position or defective
4. Locked in purge cycle, no ice
• Drain solenoid valve not opening
• Drain obstructed
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