Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 131

Fault messages
Fault mes- Cause
sage
"287: Eng Head temperature on the
head under- Stirling engine is too low.
temp"
"289: WCS Combined fault 284 and
overt + inner 280.
iron"
"290: WCS Combined fault 284 and
overt + DA" 281.
"291: WCS Combined fault 284 and
overt + G83" 282.
"292: WCS Combined fault 284 and
overt + Alt" 283.
"293: WCS Combined fault 284 and
overt + SC" 285.
"294: WCS + Combined fault 284 and
eng head 286.
overt"
"295: WCS + Combined fault 284 and
eng head 287.
undert"
"296: WCS Combined fault 284 and
overt + Reg" 288.
(cont.)
Remedy
Check spring length; adjust if
necessary (see page 77).
Check plug-in connection
X205, connecting cables and
plugs to thermocouples on
the Stirling engine.
If the fault recurs, replace the
control unit PCB (see
page 138).
Take steps to rectify fault 284
and 280.
Take steps to rectify fault 284
and 281.
Take steps to rectify fault 284
and 282.
Take steps to rectify fault 284
and 283.
Take steps to rectify fault 284
and 285.
Take steps to rectify fault 284
and 286.
Take steps to rectify fault 284
and 287.
Take steps to rectify fault 284
and 288.
Troubleshooting
Re-
set-
ting
AR
SR
SR
SR
SR
SR
SR
SR
SR
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