Response On Start-Up; Operating Notes; Step Function; Display Description - Siemens QAX34.1 User Manual

Commissioning notes

Response on start-up

Wink function display
with LON-devices

Operating notes

Siemens
Building Technologies
After an interrupt of the PPS2 interface the communication will only be re-established
when the connected controller polls the PPS2 addresses. The duration of the corre-
sponding cycle is:
RXA: 10 sec; RXB, RXL and RXC: 3 min; PX: 30 sec.
When the supply voltage is connected (via PPS2 interface) or when the controller initi-
ates a reset, the room unit initially responds as follows:
Step Function
1 LCD test
2 Identification by
controller
3 Room unit
ready for opera-
tion
If the room unit is connected to a L
display can be used as an aid to commissioning. If the RXT10 commissioning and ser-
vice tool initiates a wink command, the type of controller connected will be displayed on
the room unit. For example:
Controller type Display
RXC21.1
RXC30.1
During operation and commissioning, the LCD display also indicates errors, as follows
Display Description
C: No communication with controller for more than 64 s
02:
Room temperature sensor outside range 0 ... 40 °C
Room unit not yet in list of PPS2 components (during
controller start-up phase)
Controller does not recognize room unit type
Initial value after start-up, before the controller transmits a
signal
Controller transmits no valid T-value
S Static error: The error code remains in the display until the cause of the error has been dealt with.
D Dynamic error: The error code will be displayed instead of the room temperature for 5 s after
occurrence of the error. The display will then revert to normal. While the error persists, the error
code will be re-displayed each time the + or – key is operated. The setpoint can be adjusted by
pressing the key again.
All other error codes indicate hardware faults.
QAX34.1 – Room unit with PPS2 interface
Description
All segments of the display activated for approx. 5 s.
The display reads
until the controller identifies the
room unit as a PPS2 component.
1 second after identification by the controller, the room
unit is ready for operation.
M -compatible controller (DESIGO RX), the
ON ARK
Firmware version (e.g. Version 2.0)
Error type
D
S
D
D
S
S
5/8
CA2N1645en_02
30 Jun 2009