Hi all,

I have a non working Fujitsu outdoor unit.

The incoming AC is all good. Getting a constant 300V DC out of the ACTPM. So that's all good.

Fan motor diode tests are all good.

However, there is no 15V DC going to pin 5 of the fan motors. Likewise I have no 5v at the thermistors.

I can't see any obvious issues with the PCB (and checked the resistors, transistors, tracks, caps and fuses). But we aren't getting the correct Low voltage.

Any help would be greatly appreciated.

Cheers