Test Programs; Resetting Parameter To Factory Settings - Vaillant ecoTEC plus Instructions For Installation And Servicing

10.2

Test programs

Special functions can be triggered on the appliances by
activating various test programs.
These programs are given in detail in the Table 10.5.
• The test programs P.0 to P.6 will be started when
"Power ON" is turned on and the "+" key is pressed
for 5 s. The display shows "P.0".
h Note!
If the power switch is out of reach, alternative-
ly press the reset button
key until "P0" is displayed.
• Press the "+" key to start counting the test number
upwards.
• Press the "i" to operate the appliance now and to
start the test program.
• Press "i" and "+" simultaneously to exit the test
programs. You can also exit the test programs by not
pressing any key for 15 minutes.
Display Meaning
P.0 Bleeding test program. The heating circuit and hot
water circuit (when accessories are fitted) is bled
via the automatic air vent (the cap on the automatic
air vent must be loosened).
P.1 Test program where the appliance is operated in
full load after successful ignition
P.2 Test program where the appliance is operated
with minimum gas volume (ignition gas volume) after
successful ignition
P.3 Not available
P.4 Not available
P.5 Test program for the safety temperature limit check;
appliance heats up by by-passing a regulating shut
down through the flow regulator until the shut off
temperature of 97 °C is achieved.
P.6 Filling test program. The diverter valve moves to
the centre position
Table 10.5 Test programs
10.3

Resetting parameter to factory settings

Besides the option to reset individual parameters manu-
ally to the factory settings specified in tables 10.2 and
10.3, you can also reset all parameters simultaneously.
• In the second diagnostic level, under the diagnostic
number "d.96" change the value to 1 (see section 10.1.2).
The parameters of all adjustable diagnostic numbers
now correspond to the factory settings.
Instructions for installation and servicing ecoTEC plus / 0020020828_05
then hold the "+"
Troubleshooting 10
37