Samsung Split System DC under/over voltage error

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  #1  
Old 06-20-15, 12:46 AM
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Samsung Split System DC under/over voltage error

My two year old Samsung system will not heat or cool. The indoor unit turns on but the outdoor unit will not.

I have removed the cover from the condenser unit and inspected the main board. The diagnostic light sequence indicates a dc-link voltage under/over or PFC Overload / H / W DC link over error.

I have inspected connectors and verified AC voltage is correct. There doesn't appear to be any corrosion or water ingress on the board. I haven't yet removed the board to inspect the underside. Wiring between the units appears sound. When the indoor unit is switched on I can here relays switching on the pcb board.

Troubleshooting guides online suggest that the error can occur if:
Voltage across C101, 102 & 103 on the Outdoor PCB is out of range and
Causes are Mains voltage spikes or brown outs, Compressor slugging liquid, bad Outdoor PCB

This is an image of the PCB board: http://i.imgur.com/jxaU4eN.jpg

This is a shot of the wiring diagram for the unit and error code list: http://i.imgur.com/5O21JMo.jpg

The model of the condenser unit is: AQV09TWSX

Any assistance would be much appreciated!

Max
 
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  #2  
Old 06-20-15, 02:11 AM
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Look for your warranty . Proceed accordingly .

Is this a mini split ?

Dig up all your paper work , especially any that would have parts information .

God bless
Wyr
 
  #3  
Old 06-20-15, 02:18 AM
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The wiring diagram shows an EMI filter with a fuse . Check that .

Look for any other fuses .

God bless
Wyr
 
  #4  
Old 06-21-15, 12:42 AM
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Thanks for the reply. I have just found out that the air conditioner has an extended warranty, so I'll go down that track
 
  #5  
Old 06-21-15, 01:20 AM
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Great !

:-)

God bless
Wyr
 
  #6  
Old 06-21-15, 11:21 PM
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That control board in your picture had gotten wet. If you don't clean off the signs of water damage the warranty will be void. You will also need to find out where the water is coming from.
 
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