Manitowoc

ICE MACHINE WILL NOT HARVEST1. Verify cubes are present in evaporator and freezetime exceeds freeze chart cycle time.• Initial freeze cycle after resetting at toggleswitch will be 5 minutes longer than chart time(refer to “Sequence of Operation” on page 86).• Verify control board is not set for additionalfreeze time to fill out the ice cubes, see “CubeWeight Adjustment” on page 97.2. Observe control board light:• Steady light indicates thermistor operation isnormal.• Slow flash indicates a thermistor problem(open or disconnected). Verify liquid linethermistor is connected to control board,securely attached to liquid line and insulated.Refer to Resistance chart and Ohm thermistor.• Rapid flash indicates liquid line temperatureexceeded 170°F (76.7°C) (refer to “DischargePressure High Checklist” on page 150). Ifunable to determine cause, refer to Resistancechart and Ohm thermistor.3. Reset ice machine.• Wait freeze cycle time plus an additional 5minutes (refer to “Sequence of Operation” onpage 86).4. Verify the water inlet valve is energized during theentire harvest cycle and water flow is normal.• Although the hot gas valve is energized, theice machine will not consistently harvest if thewater inlet valve does not energize or has lowwater flow.5. Check for power at the hot gas valve• Power is present – replace coil/valve.• No power at hot gas valve – check for power atcircuit board connector, replace control board ifno power is present.Part Number 80-01111-9 7/10 145