Description
The status indicator LED can be used to identify the following status
during startup/power on:
1
Red, steady: Default when power is available.
2
Red, flashing: Power is on, self-test is ongoing, operating system
is loading.
3
Green, flashing: Application is loaded and waiting for commu-
nication.
4
Green, steady: Power unit is operational.
If the LED does not turn steady green after 30-60sec, then the status
indicator LED can be used to identify the following issues:
•
No color: Power to the power unit is missing.
•
Red, steady: Internal error.
•
Red, flashing: Firmware error or self-test failure.
•
Green, flashing: Communication error to another module.
Power unit status
LED
Required test equipment
Equipment needed for troubleshooting:
Note
Equipment
Multimeter
Insulating gloves
3HAC065464-009
Circuit diagram - OmniCore C90XT
Preparations
Action
Check the FlexPendant for errors and warnings.
1
Power the controller off. Wait one minute, power the controller on.
2
Make sure that the control system power supply is in run-time mode.
3
Wait 30-60 seconds after power-on.
Continues on next page
Product manual - OmniCore C90XT
383
3HAC073706-001 Revision: D
© Copyright 2020-2021 ABB. All rights reserved.
7 Troubleshooting
7.3.4 Troubleshooting the power unit
Continued
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