Vaillant VRT 230 - Service;diagnostic level

28 VRT 230 Installation Manual
Display Set by turning the dial
Month setting
For activation of the cal-
endar
Year setting
For activation of the cal-
endar
Table 11.1 System parameters
11.2 Service/diagnostic level
Access the service/diagnostic level by
pressing the P button and the dial.
• Press the P button and the dial simul-
taneously for 3 seconds.
First, a heating request is triggered, to
test the connection between the boiler
and the switch relay.
Then you can select all the test options
by pressing the dial. When you press the
P button the display returns to basic
mode.
You can select the following tests:
11 Start-up