Troubleshooting
6-3
P/N 7105144G
2008 Nordson Corporation
VersaBlue_NW
Light tower colors
Alarm no. Status Green Yellow Red
Status
display
Fault
A fault switches off the motors. As soon as the fault is corrected, the motor startup protection
is automatically activated.
3 Command from field bus master missing
in control mode Field bus or Dual
The transmission data block contains the illegal
command=0
Field bus cable broken, defective or not connected
Interruptions in communication, e.g. if the master is
not switched on
Defective or missing bus terminating resistor
The network was not set up properly
Sudden resets or crashes, e.g. due to
electro-magnetic interference
NOTE: Field bus data transmitted from the field bus
master to the melter can be checked. Refer to Checking
Transmitted Field Bus Data.
5 Temperature controller output short-circuit
10 Tank empty
16 Level sensor defective
5-point sensor transmits a faulty signal
17 Level sensor failure
Broken wire at 5-point sensor
21 Channel: Overtemperature fault
Check wiring of temperature channels
Check wiring of temperature sensors
(Sensor connected to correct channel?)
Correct temperature sensor type?
(Also for external components?)
Temperature controlled system OK?
23 Channel: Undertemperature fault
Is temperature controller working/regulating?
Are the solid state relays being triggered?
Are the solid state relays switching through the line
voltage?
Is the line voltage too low?
Heater defective?
Check wiring of temperature channels
Check wiring of temperature sensors
(Sensor connected to correct channel?)
Correct temperature sensor type?
(Also for external components?)
Temperature controlled system OK?
Continued...
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