Ecoair ECO906SQ Installation And Operation Manual page 32

Connect indoor and outdoor electric wires
When outdoor ambient sensor malfunction happened,
both of the electric heating belts stop working, otherwise,
it will run at the following control:.When Toutdoor ambient
=-5. and the compressor doesn't started, that the
compressor electric heating belt starts to work; Otherwise
if compressor started or compressor doesn't start but
Toutdoor ambient>-2. , the electric heating belt
Electric heating belt
will not work. Compressor doesn't start and -5.<
T outdoor ambient =-2., compressor electric heating
belt keeps the original state.. W hen Toutdoor ambient=
3., the condenser electric heating belt work; Otherwise,
if Toutdoor ambient>6 ., the condenser electric heating
belt will not work. 3.<Toutdoor ambient=6., the condenser
electric heating belt will keep the original state.