ABB IRC5 Operating Manual page 79

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Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Test Note
Measure the DC DSQC 661 requires a minim-
voltage while the out- um load of 2A in order to de-
put is connected to liver +24V.
DSQC 662 or some
Measure the voltage using a
other load.
voltmeter at the DC output
connector X2. The voltage
should be: +24V < U < +27V.
If the voltage measured at
the load falls below +24 V,
voltage drops in the cables
and connectors.
The DC output connector X2
is shown in the Circuit Dia-
gram in Product manu-
al - IRC5.
Measure the input Measure the voltage using a
voltage to the DSQC voltmeter. Voltage should be:
661. 172 < U < 276V.
The AC input connector X1
is shown in the Circuit Dia-
gram in Product manu-
al - IRC5.
Check switches Q1-2. Make sure that they are
closed.
Their physical location is
shown in the Circuit Diagram
in Product manual - IRC5.
Check main fuse F2 Make sure that they are
and optional fuse F6 open.
if used.
Their physical location is
shown in the Circuit Diagram
in Product manual - IRC5.
Make sure that the in-
put voltage to the
cabinet is the correct
one for that particular
cabinet.
Check the cabling. Make sure that the cabling is
correctly connected and not
faulty.
The DSQC 661 may How to replace the unit is
be faulty, replace it detailed in Product manu-
and verify that the al - IRC5.
fault has been fixed.
© Copyright 2005-2018 ABB. All rights reserved.
4 Troubleshooting by unit
4.9 Troubleshooting the system power supply
Action
If the correct voltage is detected
and the DC OK led is green, the
power supply is working properly.
If the correct voltage is detected
and the DC OK led is off, 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.
If the input voltage is correct,
proceed with step 10.
If no or the wrong input voltage is
detected, proceed with step 6.
If the switches are closed, pro-
ceed with step 7.
If the switches are open, close
them. Verify that the fault has
been fixed and restart this guide
if necessary.
If the fuses are open, proceed
with step 8.
If the fuses are closed, open them.
Verify that the fault has been fixed
and restart this guide if necessary.
If the input voltage is correct,
proceed with step 9.
If the input voltage is incorrect,
adjust it. Verify that the fault has
been fixed and restart this guide
if necessary.
If the cabling is OK, the problem
is likely to be the transformer T1
or the input filter. Try to get this
part of the supply working. Verify
that the fault has been fixed and
restart this guide if necessary.
If the cabling is found unconnec-
ted or faulty, connect/replace it.
Verify that the fault has been fixed
and restart this guide if necessary.
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