Troubleshooting - Siemens RMB795B Basic Documentation

Questions and replies
Siemens
Building Technologies
17.3

Troubleshooting

The following list contains questions and replies relating to errors and fault status
messages:
Question
The wrong language was selected
during commissioning.
Where do I find my language?
The device is completely off, the
operator unit displays "Operation
locked, Remote operation".
How do I restart the device?
It is not possible to change from
the Commissioning menu to the
Main menu.
The operator unit displays
"Caution! Invalid settings, start not
possible".
How do I restart the device?
Fault status message
"[N.X4] sensor error" cannot be
acknowledged.
The individual room controller is
not operating using the
preselected operating mode.
Central control unit RMB795B
Help in case of faults
Answer
Press the ESC button and the OK knob
simultaneously.
Select the password level and enter number
112 as the password (same as international
emergency call) and confirm by pressing the
OK knob. The language changes to English.
Select your language from the Settings >
Device > Language menu.
The device was put into commissioning mode
via remote operation (OCI700.1). Local
operation is locked.
It remains in this state, if the controller is not
correctly restarted remotely.
Locally, the controller can only be restarted by
briefly disconnecting it from power.
The configuration was not completely
downloaded via the service tool (OCI700.1).
Reload the configuration with the service tool
(OCI700.1), or reconfigure the device via the
operator unit.
When the Commissioning menu is quit, the
central control unit checks to see which
sensors are connected. If, later, one of the
sensors connected now is missing, a fault
status message will be delivered.
If an incorrectly wired sensor is only rewired
later, a "wrong" fault status message will be
generated.
Remedy:
Go to the "Commissioning" menu (Caution!
plant stops), then back to the main menu
(Caution! Plant starts).
Check to see if communication is connected
and operational.
The geographical address (apartment) of the
relevant room group must be the same for the
RMB795B central control unit and individual
room controllers.
In addition, the time switch zone slave (room)
must be set to 1 (fixed), and all settings of the
subzones must be set to 1 (fixed).
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CE1P3122en
18.01.2012