Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Support on errors and faults 03.10.2011
29.4 Resolve errors
Question Answer
During commissioning, the wrong
language was selected.
Where do I find my language?
1. Press the ESC and OK buttons
simultaneously.
2. Select the password level and enter
number 112 as password (same as
international emergency call) and
confirm by pressing OK. The
language changes to English.
3. Select your language via "Settings >
Device > Language".
The device is completely off, the
operator unit displays "Operation
locked, Remote operation".
How do I restart the device?
Remote operation (OCI700.1) set the
device to commissioning mode, which
locked local operation.
If the controller is not correctly restarted
via remote operation, it remains in this
state. Locally, the controller can only be
restarted by briefly disconnecting it from
power.
Changing from the "Commissioning"
menu to the main menu is not possible,
the display reads "Caution! Invalid
settings, start not possible".
How do I restart the device?
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.
Maximum Economy Changeover does
not work (properly).
Readjusting the setpoint has no impact.
Check the configuration. If "MECH input
1" and "MECH input 2" are configured,
but the inputs do not use the same unit
or one of the inputs is not connected,
Maximum Economy Changeover does
not work properly.
Fault status message "[N.X4] sensor
error" cannot be acknowledged.
When exiting the "Commissioning"
menu, a check is made to see which
sensors are connected.
If one of the sensors connected is
missing later, a fault message appears.
If a sensor was incorrectly wired and is
rewired later, a "false" fault message
may be generated.
Remedy:
Go to the "Commissioning" menu
(Caution, plant stops!), then return to
the main menu (Caution, plant starts).
The buttons on the QAW740 room unit
do not work.
On the controller, the room operating
mode is overridden by a higher priority.