ABB IRC5 Operating Manual page 78

4 Troubleshooting by unit
4.9 Troubleshooting the system power supply
Continued
Troubleshooting procedure
The troubleshooting table is supposed to be used as a detailed instruction together
with the troubleshooting flowchart.
1
2
3
Continues on next page
78
Test Note
Check the indicator The indicator LED is labelled
LED on DSQC 661. as DC OK led.
Check connection Make sure that the power
between DC output supply is connected to
and the connected DSQC 662.
unit.
A minimum load of 2A is re-
quired on the DC output
connector X2 for the DSQC
661 to work properly.
Check for short circuit Check both the DC output
on DC output. connector X2 on DSQC 661
and the input connector X1
on DSQC 662.
Measure the resistance
between voltage pins and
ground. The resistance
should not be less than 10
ohms.
Do not measure the resist-
ance between pins. Dual
pins are used for both power
supply and ground.
The DC output connector X2
is shown in the Circuit Dia-
gram in Product manu-
al - IRC5.
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Action
If the LED is:
•
•
•
If the connection is OK, proceed
with step 3.
If the connection is faulty or the
power supply is not connected to
DSQC 662, repair connection/con-
nect it. Verify that the fault has
been fixed and restart this guide
if necessary.
If no short circuit is found, pro-
ceed with step 4.
If a short circuit is found on DSQC
661, proceed with step 10.
If a short circuit is found on DSQC
662, get that unit working. Verify
that the fault has been fixed and
restart this guide if necessary.
Note
Operating manual - Troubleshooting IRC5
GREEN, the DSQC 661
should be working prop-
erly.
PULSING GREEN, the DC
output is probably not con-
nected to any unit (load) or
there may be a short circuit
on the output. Proceed with
step 2.
OFF, either the DSQC 661
is faulty or it does not have
sufficient input voltage.
Proceed with step 4.
3HAC020738-001 Revision: AA