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Building Technologies
Bus operator unit RMZ792
CE1P3113en
HVAC Products
12 Support in the event of errors and faults
03.04.2006
Error / error message
Cause / remedy
During commissioning, the wrong language
was selected. How do I find “my” language?
1. Press simultaneously the ESC
button and the OK knob.
2. Select the password level, enter
112 as the password (same no.
as international emergency call)
and confirm by pressing the OK
knob. The language changes to
English.
3. Go to menu
Settings > Device >
Language
to change to the re-
quired language.
Start menu does not show time of day, week-
day and date
•
No bus user in the system uses
the system time (no clock time
master)
•
Since it was switched on, the
bus operator unit has received
no system time telegram
•
Any of the line couplers does not
forward (filter) the telegram
The views of time switch, calendar, etc., show
the date 01.01.2000
Fault information from room controllers (e.g.
RXB2…) is not available(display “
?
” on the
device list)
The controller only communicates
in S-mode. Set communication of
the room controller with the ETS or
ACS to LTE mode and S-mode
Controller does not accept the
Room number
or
the
Device name
of the individual room control-
ler (e.g. RXB2…)
The
Room number
may comprise no
more than 5 characters, the
Device
name
no more than 10 characters.
Text entries must be appropriately
shortened
Bus operator unit cannot reset the fault status
message from a controller
Remote reset of faults is not per-
mitted. Make appropriate setting on
the controller (refer to section 10.4
“Resetting faults”).
