Tests, service, troubleshooting
84
RCMS460-490_D00067_03_M_XXEN/12.2017
7.3.3 CT connection fault display (channel-related)
LED "ALARM 1“ lights up. The programmed common alarm relay switches. The
following text appears on the display of the RCMS…-D:
The "CT fault" is displayed in the same way as „Device error display (channel-
related)“ on page 83.
Possible causes:
Measuring current transformer defective.
Power supply cable interrupted.
Power supply cable short-circuited.
Failure of the power supply unit AN420 or AN110 when W…AB series
measuring current transformers are used.
7.3.4 External alarm
LED "ALARM 2“ lights up. The programmed common alarm relay switches.
Possible causes:
Alarm message from an external device.
Device failure
Fault 1/1
CT connection
Addr.: 2 Chan.: 4
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