Troubleshooting
6‐21
P/N 213828_11
2014 Nordson Corporation
VersaBlue_PPA
Others
Problem Possible cause Corrective action
1. 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.
2. The 5‐point level
sensor transmits a
faulty signal, causing
the fault Level sensor
defective
The sensor can not determine a
constant level at the measuring
points
Material residue is stuck to the upper
measuring point. Remove residue.
A block of material is added that is
too far from the sensor.
Increase sensitivity if needed (Refer
to Replacing 5‐point Sensor Evaluator
(Option) / Calibrating in the section
Repair)
Granulate was poured into the tank
but not distributed evenly
Distribute such that the granulate is
spread evenly around the sensor
3. Fault Level sensor
failure at 5 point level
sensor
Wire broken or not plugged in Refer to LEDs of 5‐point Sensor
Evaluator to determine which cable is
faulty
4. Leakage at pump
shaft seal
Pump shaft seal is worn
Pumps with gland: tighten
Replace pump shaft seal
5. Material pressure too
low, output quantity
too low
Gear pump is worn Replace pump
6. Gear pump blocked
Processed material too cold Correct temperature setting (observe
data sheet of material manufacturer)
Foreign material in gear pump Replace pump
7. Leakage at applicator
during heatup phase
Safety valve does not open
(expansion pressure)
Replace safety valve
8. Leakage around
pressure sensor
Brass washer missing A pack of 10 washers is available as
P/N 7157515
9. Melter always
switches to Shutdown
CAN bus terminating resistors not
connected properly
Terminate CAN bus on both ends
(Temperature control board - motor
controller or Temperature control
board - pressure sensor) as shown in
the wiring diagram.
One or more control components
on the CAN bus have failed
Check, replace if necessary
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