Troubleshooting
8-13
Part 1120130
E 2011 Nordson Corporation
Troubleshooting Pump
No Material (Pump Does not Rotate)
Possible Cause Possible Fault / Troubleshooting Corrective Action
1. Melter not yet ready
for operation (heatup
phase)
— Wait until the melter has heated up
and the green indication lamp is lit
2. Melter at present not
ready for operation
(undertemperature
during operation)
Material was refilled Wait until the melter has heated up
and the green indication lamp is lit
3. Motor not enabled — Enable motor
4. Speed (rpm) not set — Set speed (rpm)
5. Standby entered — Exit or wait until standby period has
expired
6. Motor overheated
Ambient temperature too high Decrease ambient temperature by
cooling or airing out
Fan cap dirty Clean
Pump blocked by foreign matter Replace pump
Pump operates too sluggish Replace pump
Material too cold Set temperature accordingly
7. Motor defective — Replace
8. Motor not supplied
with voltage
— Technical inspection
9. Motor drive fault — Switch melter off and on again with
main power switch
Motor overheated See above
Motor controller overheated Decrease ambient temperature by
cooling or airing out
Clean cooling section of motor
controller
Short circuit Check motor cable
Overload (pump blocked by foreign
matter, pump too sluggish, material
too cold)
Refer to 6.
10. Motor drive defective — Replace
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