Troubleshooting; Fault Display; Implementing A User Reset - Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors

Fault display

Calling up fault messages
Faults are indicated in the display by
means of symbols "Î" or "Ϊ".
Î Fault with automatic reset after
removal.
Ϊ Fault with "User reset" (UR) by
button or by "Service reset"
(SR) after removing the fault.
Fault history
Up to 10 faults are saved and displayed.
Faults are listed according to their prior-
ity (not chronologically).
Fault with display "Î"
1. Press "Å". The fault message appears
on the display along with a brief
description.
For further information, see
page 123.

Implementing a user reset

2. Correct the fault. A restart follows
automatically.
Fault with display "Ϊ"
1. Press "Å". The fault message appears
on the display along with a brief
description.
For further information, see
page 123.
2. Press "Å" again. The type of reset is
shown in the display.
3. Correct the fault.
4. Depending on the type of reset, press
and confirm with "OK" or carry out
"Service reset" (see page 122).
1. Press .
2. Confirm with "OK".

Troubleshooting

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