Need Help Fujitsu ASY12RSGCW

[Ash Khan]

Dear All,

This wall mount unit is working fine on cooling but as soon when i try to turn on heating indoor unit fins stop moving, light stay on it like indoor unit is pause and outdoor unit runs like normal.

Is anyone know what could be the problem?

Many Thanks

[paul_h]

The indoor fins (fan) in heating mode only runs when the indoor coil is hot.
So faulty coil thermistor detecting the heat, or reversing valve operation in the outdoor (coil, valve, wiring) or system short of refrigerant.
If you're a tech that's easy things to check (is the indoor or piping cold? is there power at the reversing valve solenoid? what is the pressure in the pipings at the service valve? etc)

[Ash Khan]

Thanks Paul,

I will have a look again on coming weekend, I am not prof tech but I know lots of things in A/Cs.

[7258james]

Does the system have a Pc Board with cold air prevention mode? Does this occur only at start up and it eventually come good or does it do this activity all the time?

[luboboi]

in heating mode the indoor fan will run only after a heated heat exchanger

[Ash Khan]

7258james: it work fine on cooling when i turn into heating mode green light stay on but fan dosent turn on.

luboboi: thanks for your info

paul_h: I still haven’t got chance to have a look again, Thanks

Thanks All