45Installation and maintenance instructions ecoTEC 0020029173_01
9.1.2 Diagnosis codes
In the diagnosis mode, you can change certain
parameters or display more information.
The diagnosis information is divided into two diagnosis
levels. The 2
nd
diagnosis level can be reached only after
entering a password.
a
Caution!
The access to the 2
nd
diagnosis level may only
be used by a qualified heating engineer.
1
st
diagnosis level
• Push the "i“ and "+“ buttons simultaneously.
The display shows "d.0“.
• Scroll to the desired diagnosis number on the 1
st
diagnosis level with the "+" or "–" buttons (see
Table 9.2).
• Push the "i" button
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 the "i" button pressed
for about 5 seconds until the display stops flashing.
You can finish the diagnosis mode as follows:
• Push the "i“ and "+“ buttons simultaneously or
• Do not push any buttons for about 4 minutes.
The current heating flow temperature or the current
water pressure of the heating installation reappears in
the display.
Troubleshooting 9
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