Schedule Now! 702-437-1888

The first thing you do when you find that there is no 230 volts going to the condenser is check the compressor for a ground.

First simply test the compressor wires at the contactor and if you think you may have a ground then test the compressor directly.

(Note: To test for a grounded compressor use a volt meter set to ohms and set it to beep when there is continuity. Now place one led onto ground try scratching the lead into the suction line of the compressor. Place the second lead directly onto the compressor terminals after removing the wires. Try all 3 terminals and if even 1 terminal has continuity to ground than it’s a bad or grounded compressor.)

If your Compressor is grounded then there’s no saving it, a ground is terminal and the compressor needs replaced.

Let’s go replace a grounded compressor

If there is no ground then we need to back tract 230 until we find it.

Open the disconnect box and remove the cover, exposing the wires inside.

Test for 230 volts at the T side of disconnect.

 

If you do have 230 there and not at the contactor then there must be a break in the line between them so you need to replace the electrical whip.

If you do not have 230 volts there test for 230 volts at Line side of disconnect

If you do have power there then you have bad fuses if applicable or a bad breaker if applicable you know which you have.

If you have a bad disconnect stop here and move to page 15 now to change that disconnect.

Let’s go replace a disconnect

If there is no 230 volts coming into disconnect from wall, turn off the breaker or pull disconnect.

Go to the main electrical panel and locate breaker for AC in question. Flip that breaker all the way off and then back on again.

Now test for 230 volts leaving that breaker

If you do not have 230 leaving the breaker even after resetting, it’s bad and needs replaced.

If you do have 230 Volts leaving the AC breaker turn it off and tighten all the wires at the breaker for Ac at disconnect and at the contactor.

Put your amp probe on the main power wire entering the condenser and set it to amps AC or AAC.

Now go turn on the main AC breaker in electrical panel, then turn on the disconnect breaker or put in disconnect while at the same time watching the amp probe.

You want to see the machine start up and pull between 8-25 amps depending on size and condition.

If the system even for 1/10th of a second pulls over 30 amps you need a hard start kit installed to prevent the compressor from failing soon. So move to page 16 to install your kick start.

 

If your machine starts up fine and does not pull a hard start then, just move to page 18 now to check the pressures.

© Copyright Las Vegas Air Conditioning