ABB IRC5 Operating Manual page 83

Troubleshooting procedure
The troubleshooting table is supposed to be used as a detailed instruction together
with the troubleshooting flowchart.
1
2
3
4
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Test Note
Check the indicator The indicator LED is labelled
LED on DSQC 662. Status LED.
Check USB connec-
tion on both ends.
Try to fix the commu- Make sure that the USB
nication between the cable is properly connected
power supply and the on both ends.
computer by recon-
necting the cable.
Disconnect one DC Make sure that at least one
output at a time and unit is connected at all times.
measure its voltage. A minimum load of 0.5- 1A is
required on at least one out-
put for the DSQC 662 to work
properly.
Measure the voltage using a
voltmeter. The voltage
should be: +24V < U < +27V.
The DC outputs are shown
in the Circuit Diagram in
Product manual - IRC5.
© Copyright 2005-2018 ABB. All rights reserved.
4 Troubleshooting by unit
4.10 Troubleshooting the power distribution board
Action
If the LED is:
If the connection seems OK, pro-
ceed with step 6.
If there is a problem with the con-
nection, proceed with step 3.
If the communication comes back
up, verify that the fault has been
fixed and restart this guide if ne-
cessary.
If unable to fix the communication,
proceed with step 6.
If the correct voltage is detected
on all outputs and the Status LED
is green, the power supply is
working properly.
If the correct voltage is detected
on all outputs and the Status LED
is NOT green, the power supply is
regarded as faulty but does not
have to be replaced instantly.
If no or the wrong voltage is detec-
ted, proceed with step 5.
Continued
• GREEN, the DSQC 662
should be working properly.
• PULSING GREEN, a USB
communication error has
occurred. Proceed with
step 2.
• RED, the input/output
voltage is low, and/or the
logic signal ACOK_N is
high. Proceed with step 4.
• PULSING RED, one or
more DC outputs are under
specified voltage level.
Make sure cables are prop-
erly connected to its re-
spective units. Proceed
with step 4.
• PULSING RED/GREEN, a
firmware upgrade error has
occurred. This is not sup-
posed to happen during
runtime mode, proceed
with step 6.
• OFF, either the DSQC 662
is faulty or it does not have
sufficient input voltage.
Proceed with step 4.
Continues on next page
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