ABB IRC5 Operating Manual page 80

4 Troubleshooting by unit
4.9 Troubleshooting the system power supply
Continued
Troubleshooting flowchart
xx1200001313
80
DSCQC 661
PULSING
GREEN
Fix connections
Short circuit on
Fix short circuit
7. Check fuses F2
(F6)
Fuses
Fuses open
closed
Open fuses 8. Measure AC
to cabinet
AC ok
9. Check
Adjust AC input
cabling
Faulty Cabling OK
cabling
Probable cause of
Fix cabling
transformer T1 or
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1. DC OK LED
OFF
Connections
not OK 2. Check Output
connections
Connections
No short circuit
OK
unit(s)
3. Check for short
Short circuit on
circuits on outputs
Wrong AC
Switches
level
closed
6. Check switches
Q1-2
Switches open
Close switches
Q1-2
AC not ok
dysfunction:
filter
Operating manual - Troubleshooting IRC5
GREEN
Correct DC
4. Measure DC Level
output
Wrong DC
level
output(s)
Correct AC
level
5. Measure AC
input
10. Replace
DSQC 661
The power supply
unit works
properly
3HAC020738-001 Revision: AA