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OM-884 Page 26
5-6. Use Of Indicator Lights For Troubleshooting
Gas Indicator LightOn Off
Gas flows: Gas does not flow: Gas flows: Gas does not flow:
System normal (on.) Check gas valve operation. Check gas valve operation
and gas line for leaks.
System normal (off).
Check interface board PC3.
Contactor Indicator LightOn Off
Contactor closed: Contactor open: Contactor open:
System normal (on). Check interconnecting cords. System normal (off).
Check interface board PC3.
Wire Feed Indicator LightOn Off
Wire feeds: Wire does not feed: Wire feeds: Wire does not feed:
System normal (on). Check circuit breaker CB1. System normal (off).
Check relay CR1.
Check interface board PC3.
Current Indicator LightOn Off
Arc started: No arc: Arc started: No arc:
System normal (on). Replace reed relay. Replace reed relay. System normal (off).
Arc Failure Indicator LightOn Off
No arc: Arc started:
Normal during idling.
No arc:
Check weld
Check input signal from
Normal while welding.
Contactor closed:
Check display board PC4.
robot to motor board PC2.
Signal should be 0-10 vdc
between pins K and B
(common) at RC5.
Check motor board PC2.
Arc started:
Check signal from robot.
parameters. Signal should be 24 vdc
between terminals 1 TL
and 1 TM.
Check display board PC4.