The machine does not function at all with remote controller and switches on the indoor unit.
Using a tester, measure the voltage between anodes of D1 and D2 on the PWB ass'y 1.
measure the secondary voltage of transformer.
Is the measure dvalue approx. 14.7 Vac ?
NO
YES Replace the PWB with a new one. YES Replace the fuse and varistor with new ones. Replace the ftransformer with a new one. Is the 2.5A fuse down ? NO
