Nordson VersaBlue 100H/100H, Manual

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Troubleshooting
6-6
P/N 7146386A
E
2008 Nordson Corporation VBN w/o Control System
Filling valve (option)
Problem Possible Cause Corrective Action
No material No compressed air to control
module or compressed air set too
low
Connect compressed air and set to
correct value
Control module defective Replace control module
Filling valve does not heat Temperature not set Set on temperature controller of
VersaBlue melter or on filling unit
Plug not connected Regulating via VersaBlue
Connect to corresponding hose
receptacle
Regulating via filling unit
Connect to hose receptacle
Temperature sensor(s) defective Replace
Filling valve does not reach
set temperature
Heater cartridge(s) defective Replace
Solenoid valve does not
switch
Solenoid valve is not triggered or is
defective
Trigger via customer’s PLC or
replace solenoid valve
Others
Problem Possible Cause Corrective Action
Leakage at pump shaft seal
Pump shaft seal (Variseal R ) is
worn
Replace pump shaft seal
Pump shaft seal is worn When present: Retighten gland
− Replace pump
Material pressure too low,
output quantity too low
Gear pump is worn Replace pump
Gear pump blocked Processed material too cold Correct temperature setting
(observe data sheet of material
manufacturer)
Foreign material in gear pump Replace pump
Leakage at gun during
heatup phase
Safety valve does not open
(expansion pressure)
Replace safety valve
Overflow protection
(option) is activated,
although level has fallen
below sensor
Alarm caused by material residue
stuck to sensor
If overflow protection is triggered,
the fault must be acknowledged.
As soon as the level has fallen
below the sensor, it must be
cleaned to prevent material residue
from immediately triggering another
alarm.