User Manual

14.2 Troubleshooting
14.2.1 Fault indicator
If one or several fault messages are queued, the current message is displayed and
indicated via the fault LED.
Fault information is available via the following path:
Main menu > Faults >
Display fault informatio
n
Menu item Com
ment
Faults current Currently queued faults.
Fault history Individual listing of the 10 most recent faults.
Fault status message bus Faults of other devices on the bus:
The fault button allows you to acknowledge error (fault) messages. Meaning:
Fault message is… Message is… Fault LED status / Comment
Pending Unacked
Flashing /
Message must be acknowledged.
Pending Acknowledged
Lit /
Also applies to messages that must not
be acknowledged.
No longer pending Unacked Flashing
No longer pending Acknowledged Off
If a fault relay is also configured, the LED on the fault button always flashes when
the relay is energized.
A fault message is still pending if the LED on the fault button is lit and cannot be
extinguished by mere acknowledgement. The LED extinguishes only when no
more faults are present.
Note
14.2.2 Fault acknowledgement
This applies to all fault messages that do not need to be acknowledged or reset on
RMS705B.
No acknowledgement
required
A fault message is generated if the outside temperature is not available. When the
outside temperature returns, the fault message automatically disappears and the
plant resumes normal operation.
Example
Applies to all fault messages that only need to be acknowledged on RMS705B.
The fault message is displayed until acknowledged.
Acknowledge
When the fault disappears in the plant, the plant resumes normal operation even if
the fault message has not yet been acknowledged.
Caution
A plant has a pump with fault message to be reset locally at the pump. The plant
resumes operation after the pump is reset. The only purpose of the fault indication
on RMS705B is to ensure that service staff notices the fault message.
Example
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Support for errors and faults 01.04.2010