Siemens QAA73 Service Manual

Pag. 1/5

17.10.2008 Service instructions Lmu34 sw 2.09

Condensing gas boilers

NOVADENS …

USING THE SIEMENS TEMPERATURE

REGULATOR QAA73 TO PROGRAM
BOILERS PARAMETERS

GB

Pag. 2/5

17.10.2008 Service instructions Lmu34 sw 2.09

The editable parameters are those between 504 and 652 (parameters 650 and 652 are reading only
parameters).

Proceed as follows to access this parameters:

1) Simultaneously press keys 1-4 on QAA73 temperature regulator for about 3 seconds. The

“Initialising BMU parameters” appears on the display (line 725).

2) Simultaneously press keys 1-2 on QAA73 temperature regulator for about 3 seconds. The

“Initialising BMU SERVICE” (line 504 “TkSmax”).

3) Press keys 1-2 to scroll through the list of parameters.

4) To change the value of the selected parameter, press key 3-4 to decrease or increase the value

respectively.

5) Press key 5 to enter the new values and exit programming of the boiler’s electronic main board.

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