© 2022 Nordson Corporation
4-8
Spray Gun Card Troubleshooting
Refer to Figure 4-1 and Table 4-3 and Table 4-4. Use the fault codes on the Spray Gun
Control screens, the fault messages on the Alarm screen, and the LEDs on the spray gun
control cards to diagnose problems with the spray gun control cards.
Spray Gun Card Error Codes and Fault Codes
These faults, except for E16, will activate the alarm relay.
Table 4-3 Spray Gun Card Error and Fault Codes
Error
Code
Message
Fault
Code
Meaning/Correction
301
Micro-Amp fault
detected
−
Micro-amp value out of range.
302
Over-current fault
detected
E15
Over-current detected. Clear the fault, unplug the cable from the spray gun
and trigger the spray gun.
• If the fault changes to E7, check the resistance of the multiplier as
described in the spray gun manual.
• If the fault code stays E15, check the continuity of the cable as described
in the spray gun manual.
303
Feedback fault
detected
E3
Micro-amp feedback not detected. Check the spray gun current with no
parts in front of the spray gun. If the current is 105
µ
A, check for a short
circuit of the current feedback wires in the spray gun cable:
Unplug the cable from the spray gun and trigger the spray gun.
• If the fault stays E3, replace the cable.
• If the fault changes to E7, check the resistance of the multiplier as
described in the spray gun manual.
304
Open circuit
detected
E7
Spray gun cable or multiplier open circuit. If the current display is 1
µ
A or less, check the multiplier cable and electrode assembly for loose
connections.
• If the connections are secure, check the multiplier with an ohmmeter as
described in the spray gun manual.
• If the multiplier reading is acceptable, check for a defective cable as
described in the spray gun manual.
305
Short circuit
detected
E8
Spray gun cable or multiplier short circuit. Unplug the cable from the spray
gun and trigger the spray gun.
• If the fault changes to E7, check the resistance of the multiplier as
described in the spray gun manual.
• If the fault code stays E8, check the continuity of the cable as described
in the spray gun manual.
Continued...
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