Hi everyone,

Just after people's thoughts on an Actron ducted fault.
Model:SRA17C single phase with soft starter.
Ok so the customer called and said the A/C has tripped the breaker and continues to do so (40A) single phase. Worked fine for 9 years.
First I tested comp and fans for grounding, they were all clear.
Tested all capacitors, found one 50mf gone which was the run cap so i replaced that.
Start Cap tested wierd tho, supposed to be 100-120 but was around 300 wierd.
Turned unit on cooling, both condenser fans came on at high speed.
Compressor soft starter PCB has 3 min delay so I waited, and waited and waited.
No compressor not even a shudder, just a few clicks and clacks from the PCB.
I checked for power to the soft start PCB at "REQ" terminal which comes from the main PCB terminal "Comp" (which i assume is a request for compressor to start) it had 240v.
So the unit is calling for cooling but the compressor won't come on.

I think it is the soft start PCB with the issue. Interesting to hear what anyone else has to say.

Thanks guys