Philco ac outdoor unit PCB ce-kfr90gw/i1y

[maneshnandwani]

I have the above captioned board that got wet due to a typhoon and am trying to figure out which part is damaged. The led light turns on but starts blinking after a couple of mins as both the compressor and fan does not turn on and at the same time indoor unit shuts off also.

 

[maneshnandwani]

I have the above captioned board that got wet due to a typhoon and am trying to figure out which part is damaged. The led light turns on but starts blinking after a couple of mins as both the compressor and fan does not turn on and at the same time indoor unit shuts off also.

 

[maneshnandwani]

That's the old board and I bought a new board but the new board doesn't work, so I'm trying to repair the old board.

 

[dave9]

First, have you used a multimeter to determine that when the compressor should turn, it is outputting the voltage to it? I mean trace the relay that activates it and see if it is closing the circuit or failing to energize the relay coil to do that.

 

[maneshnandwani]

First, have you used a multimeter to determine that when the compressor should turn, it is outputting the voltage to it? I mean trace the relay that activates it and see if it is closing the circuit or failing to energize the relay coil to do that.

Thanks dave9. I used a tester to check output post relay and there is current being produced.

 

[dave9]

You can't measure current produced unless it is delivered through the load. Measure whether there is appropriate voltage at the compressor and fan.

I will say that one of the common faults on an A/C system is that the compressor (or fan motor) capacitor has failed.

 

[maneshnandwani]

You can't measure current produced unless it is delivered through the load. Measure whether there is appropriate voltage at the compressor and fan.

I will say that one of the common faults on an A/C system is that the compressor or fan motor capacitor has failed.

I can manually engage the ac contactor that switches on the compressor so the compressor is working. I am pretty sure that there is something only wrong with the pcb as I have switched the pcb from an identical a/c and it works.

 

[kellys_eye]

You have two boards, one of which is 100% ok. It should be a simple matter to make comparative test between the two.

Start by measuring the voltages around IC1 (appears to be a voltage regulator) then the transistors.