ABB ACS2000 User Manual page 99

T r o U b l e S h o oT i n G a n d m a i n T e n a n c e
5. Try to rectify the fault, following the instructions
in Appendix N - Troubleshooting guide, located
on the CD.
6. Contact ABB service if a fault cannot be rectified.
When contacting ABB, have the following data
available about the fault occurrence:
• Operating, ambient and load conditions
• Unusual events
After the fault has been rectified, start the drive as
described in Chapter Local operation.
DANGER
Malfunctioning grounding switch
WARNING
CAUTION: If the control circuit of the grounding
CAUTION
switch malfunctions, it is possible that the
grounding switch is closed while the DC link is still
NOTICE
charged, and because of that, the DC capacitors are
short-circuited. The short-circuit will manifest
itself in a loud bang. To prevent temporary minor
hearing impairment, follow the instructions below.
When the DC link of the drive has been de-
energized, the GROUND SW RELEASED pilot light
illuminates to indicate that the grounding switch is
released and can be turned to the grounded
position. If the release pilot light does not
illuminate and there is reason to assume
that the grounding circuit is malfunctioning,
proceed as follows:
1. Do not try with force to turn the grounding
switch in any direction.
The handle and/or the switch could be damaged or
broken if force is used.
2. Verify that the MV switchgear is in the open
position.
3. Check the drive status on the CDP control panel.
The message ReadyOn is displayed when the DC
link of the drive has been discharged.
1 L ->
StateINU
MOTOR SP
POWER
0.0 rpm
ReadyOn
0.00 rpm
0.0 kW
4 Verify that the DC link has been discharged.
The discharging level can be viewed in parameter
2.01 DC VOLTAGE. The value should be below 50 V.
5. Check if there are any alarm and fault messages
on the display.
If there are any, look up the messages in Appendix
N - Troubleshooting guide, located on the CD, and
follow the instructions.
6. Try to rectify the reason for the alarms and
faults, and then press the reset key on the CDP
control panel.
7. Contact ABB service if the cause for the
malfunctioning grounding switch cannot be
rectified.
See section General information on manual and
equipment for contact information.
LEDs and switches on PCBs and IOEC I/O devices
The following section provides an overview on the
meaning of LEDs and switches of the main circuit
boards and IOEC I/O devices. The LEDs presented
in the following section can be checked easily while
the auxiliary voltage is switched on without having
to remove covers first. The LEDs provide
information on the status of the devices
and can be used for diagnostic purposes.
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