F39
''OUTDOOR
SENSOR
FAULT
''
Outdoor air sensor cables
may
be
not mounted, or there may
be a loose contact.
Check the cables.
Replace them in case
of any problem.
Replace the outdoor sensor.
Check whether
fault
is
gone
.
The problem is
outdoor sensor.
Replace the
main
board.
YES
YES
NO
NO
Check whether P33=0 when
outdoor sensor is not
connected, if P33 ≠ 0 adjust
parameter value to 0
NO
37