Viessmann Vitotwin 300-W - Page 131

131
Fault mes-
sage
Cause Remedy Re-
set-
ting
"287: Eng
head under-
temp"
Head temperature on the
Stirling engine is too low.
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).
AR
"289: WCS
overt + inner
iron"
Combined fault 284 and
280.
Take steps to rectify fault 284
and 280.
SR
"290: WCS
overt + DA"
Combined fault 284 and
281.
Take steps to rectify fault 284
and 281.
SR
"291: WCS
overt + G83"
Combined fault 284 and
282.
Take steps to rectify fault 284
and 282.
SR
"292: WCS
overt + Alt"
Combined fault 284 and
283.
Take steps to rectify fault 284
and 283.
SR
"293: WCS
overt + SC"
Combined fault 284 and
285.
Take steps to rectify fault 284
and 285.
SR
"294: WCS +
eng head
overt"
Combined fault 284 and
286.
Take steps to rectify fault 284
and 286.
SR
"295: WCS +
eng head
undert"
Combined fault 284 and
287.
Take steps to rectify fault 284
and 287.
SR
"296: WCS
overt + Reg"
Combined fault 284 and
288.
Take steps to rectify fault 284
and 288.
SR
Troubleshooting
Fault messages
(cont.)
5618 294 GB
Service