Test Programs - Vaillant ecoMAX 646 Installation And Maintenance Manual

8.1.5

Test programs

Special functions can be triggered in the appliances by
activating various test programs. These programs are
given in detail in the following table 8.4.
• The test programs P.0 to P.6 are started when "Power
ON" is turned on and the "+" key is pressed for 5 s.
The display shows "P.1".
• Press the "+" key to start counting the test number
upwards.
• By pressing the "i" key the appliance is now put unto
operation and the test program started.
• Press "i" and "+" simultaneously to end the test pro-
grams. You can also end the test programs by not
pressing any key for 15 minutes.
Display Meaning
P. 0 Venting test program
1x "i" key: start bleeding the heating pump
(display: HP)
2x "i" key: start bleeding the charging pump
(display: LP)
3x "i" key: end bleeding program
Note: the bleeding program runs for approx. 6.5 mins.
P. 1 Test program whereby the appliance is operated at full
load after successful ignition
P. 2 Test program whereby the appliance is operated with
minimum gas volume after successful ignition
P. 5 Test program for safety thermostat test; appliance
heats up by bypassing a control shutdown until the
safety thermostat shutdown temperature of 97 °C is
reached
Table 8.4 Test programs
Installation and maintenance manual ecoMAX 646 / 0020020158_02
Troubleshooting 8
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