Diagnosis Codes - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

8.1.2 Diagnosis codes

In the diagnosis mode, you can change certain parame-
ters or display more information.
The diagnosis information is divided into two diagnosis
levels. The second diagnosis level can be reached only
after entering a password.
Caution!
Access to the second diagnosis level must be
used exclusively by a qualified technician.
First Diagnosis level
• Press the "i" and "+" keys simultaneously.
The display shows "d.00".
• Use the "+" or "–" keys to scroll through the desired
diagnosis numbers of the first diagnosis level (see
Table 8.2).
• Press the "i" key.
The display shows the relevant diagnosis information.
• If necessary, use the "+" or "–" keys to change the
value (display flashes).
• Save the new value by holding down the "i" key for
approx. 5 seconds until the display no longer flashes.
You can end the diagnosis mode as follows:
• Press the "i" and "+" keys simultaneously.
or
• Do not press any key for approx. 4 minutes.
The current heating flow temperature appears in the dis-
play again.
Second diagnosis level
• As described above in the first diagnosis level, scroll
through the diagnosis number d.97.
• Change the displayed value to 17 (password) and press
the "i" button.
You are now in the second diagnosis level where all
information from the first diagnosis level (see Table 8.2)
and the second diagnosis level (see Table 8.3) is dis-
played.
Scrolling and changing values and exiting the diagnosis
mode is done as described in the first diagnosis level.
Note
After exiting the second diagnosis level, if you
press "i" and "+" within 4 minutes, you will
directly reach the second diagnosis level with-
out having to enter the password again.
Instructions for installation and servicing ecoTEC
Troubleshooting 8
45