Troubleshooting
4-10
Part 1618871−01
2020 Nordson Corporation
Flow Node
See Figure 4-5 and refer to Table 4-4. Use the Flow Node LEDs to help
diagnose problems.
Table 4-4 Flow Node LEDs
LED Function LED
Color
LED State Fault Correction
LED1 +24 V Power Green Normal: ON
Fault: OFF
If LED1 is OFF on all flow nodes, check PS1 for
+24 Vdc (refer to Power Supplies
troubleshooting on page 4-8).
If LED1 OFF only on singlet flow node, check for
shorted valve wiring.
LED2 +5 V Power Green Normal: ON
Fault: OFF
If LED2 is OFF and LED1 is ON, either defective
LED or replace flow module.
DS1 Communication Green Normal: ON
Fault: OFF
Check CAN network terminations are correct
(Measure 60 Ω).
Check for PLC fault.
Check flow node cabling.
Check manual gun connections P4.
DS2 Fault Red Normal: OFF
Fault: ON
Check Alerts screen through Engage controller
touchscreen for fault codes.
High flow fault.
Low flow fault.
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