Troubleshooting 8-13Part 1120130 2011 Nordson CorporationTroubleshooting PumpNo Material (Pump Does not Rotate)Possible Cause Possible Fault / Troubleshooting Corrective Action1. Melter not yet readyfor operation (heatupphase)— Wait until the melter has heated upand the green indication lamp is lit2. Melter at present notready for operation(undertemperatureduring operation)Material was refilled Wait until the melter has heated upand the green indication lamp is lit3. Motor not enabled — Enable motor4. Speed (rpm) not set — Set speed (rpm)5. Standby entered — Exit or wait until standby period hasexpired6. Motor overheated Ambient temperature too high Decrease ambient temperature bycooling or airing outFan cap dirty CleanPump blocked by foreign matter Replace pumpPump operates too sluggish Replace pumpMaterial too cold Set temperature accordingly7. Motor defective — Replace8. Motor not suppliedwith voltage— Technical inspection9. Motor drive fault — Switch melter off and on again withmain power switchMotor overheated See aboveMotor controller overheated Decrease ambient temperature bycooling or airing outClean cooling section of motorcontrollerShort circuit Check motor cableOverload (pump blocked by foreignmatter, pump too sluggish, materialtoo cold)Refer to 6.10. Motor drive defective — Replace