Siemens RDG400 manual Control parameters, Parameter setting, Change the parameters as follows

4.12Control parameters

A number of control parameters can be readjusted to optimize control performance. These parameters can also be set during operation without opening the unit. In the event of a power failure, all control parameter settings are retained.

The control parameters are divided in two levels:

•“Service” level, and

•“Expert” level and "Diagnostics & test"

The “Service” level contains a small set of parameters to set up the thermostat for the HVAC system and to adjust the user interface. These parameters can usually be adjusted any time.

Change parameters in the “Expert” level only carefully, as they impact control performance and functionality of the thermostat.

Parameter setting	Change the parameters as follows:
Enter only “Service”	1.	Press left + right button simultaneously >3sec, release,
level		then press right button >3sec
		The display shows “P01” (or P02 when P01 is not available).
		Continue with Step 2.
Enter “Expert” level	1.	Press left button + right button simultaneously >3sec, release,
and		press left button >3sec,
"Diagnostics & test"		then rotate rotary knob anti-clockwise min ½ rotation
		The display shows “Pxx”.
		Continue with Step 2.
Adjust parameters	2.	Select the required parameter by turning the rotary knob.
	3.	Press	(OK); the current value of the selected parameter starts to flash and
		can be changed by turning the rotary knob.
	4.	Press	(OK) to confirm the adjusted value or (Esc) to cancel the change.
	5.	If you wish to adjust additional parameters, repeat steps 2 through 4
	6.	Press	(Esc) to leave the parameter mode.
Reset parameters	The factory setting for the control parameters can be reloaded via parameter P71,
	by changing the value to “ON”, and confirming by pressing the right button.
	The display shows “8888” during reload.

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Siemens	RDG100…/RDG110…/RDG140.../RDG160… Basic Documentation	CE1P3182en
Building Technologies	Functions	28 May 2009