Troubleshooting
4-2
Part 1618871−01
2020 Nordson Corporation
Spray Gun Card LEDs
See Figure 4-1 and refer to Table 4-1. Use the card LEDs to help diagnose
problems.
Table 4-1 Spray Gun Card LEDs
LED and
Description
Color LED
State
Fault Cause Correction
DS1: Power Green Normal: ON
Fault: OFF
Gun card has
no power
Make sure gun card is properly
seated in backplane.
Replace the gun card if other gun
cards have power.
DS2: Fault Red Normal: OFF
Fault: ON
Communication
Fault
If the DS3 LED is not blinking
check PLC and check CAN
Network Topology/Terminations.
Hardware Fault If DS3 LED is blinking check gun
cables plugged into the gun card
and plugged into cabinet.
DS3:
Communication
Green Normal: Blinking
Fault: OFF
Communication
Fault
Make sure gun card is properly
seated in backplane.
Replace the gun card if other gun
cards have power.
DS4:
GUN A Current
Limit
Yellow Normal: OFF
Fault: ON
Gun drive
current
exceeded
maximum limit
Check gun cable for damage.
Check multiplier impedance.
Check gun to part distance.
Check the part grounding for
open circuit is less than 1 MΩ.
Check high voltage arcing.
DS5:
GUN B Current
Limit
Yellow Normal: OFF
Fault: ON
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