User Manual

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Siemens QAX50, QAX51 – Flexible room unit CA2N1648en_05

Building Technologies 2015-12-23

80091 A

Fit to top rail (1) and snap-mount on bottom rail (2)

Installation notes

• Local installation regulations must be observed.

• Do not route mains voltage cables to the conduit box.

• Use only the original bus plug.

The room unit is not protected against connection to AC 230 V.

Commissioning notes

The QAX50 and QAX51 flexible room units are commissioned with the RXT10 commis-

sioning and service tool. This is connected to the L

ONWORKS® bus via the tool socket.

The RXT10 user manual (CM110669) contains a step-by-step commissioning proce-

dure for the entire Desigo RXC range.

When the supply voltage is connected (via the L

ONWORKS® bus) the room unit runs a

self-test, during which all segments of the LCD are enabled. At the end of the self-test,

the LCD panel reverts to the normal display.

The “service pin” function, which is used to transmit the identification number of the unit

to the bus can be enabled by simultaneously pressing the two setpoint adjustment but-

tons and the mode selection/fan-speed rocker switch (to the left or right). The LCD

panel displays

for approximately 1 to 2 s in acknowledgement.

80112

Press simultaneously

If the RXT10 commissioning and service tool is used to issue an identification com-

mand to in the room unit (wink function), the LCD panel responds with the display

. This display persists for a maximum of 64 s or until a rocker switch or button is

operated. The room unit then reverts to the normal display.

STOP

Warning

Response on start-up

“Service pin” function

Wink function display