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-   -   is my compressor shot (http://www.diychatroom.com/f17/my-compressor-shot-112908/)

wetbar 08-04-2011 08:24 AM

is my compressor shot
 
Hey I have a goodman 1.5 ton split system. It sounds like it wants to start but cant. I replaced the cap and installed a super starter cap. The compressor is getting a little hot but I have seen a lot hotter. It is not poping fuses and is pulling 14.5 amps across the red wire going to contactor. My amp meter would not measure the other two wires for some reason. It seemed to shoot up to 44 amps, but that cant be correct( it would pop the fuse if that was correct). It happens so fast mt meter cant get a reading. I have 4.8 ohms between the red and yellow(cap) wire and 2.8 from black to yellow. Nothing is shorted to ground. I would just think if it was the compressor it would show more signs or something.

Thanks fot the help!

JJboy 08-04-2011 10:28 AM

Check if your system has High/Low pressure switch.

Compressor:
Red - Yellow: 4.8
Yellow - Black: 2.8
Red - Black: ????

You can see on the label on the compressor RLA and LRA, check 14.5 amps is close to RLA.

wetbar 08-04-2011 10:31 AM

[quote=JJboy;700134]Check if your system has High/Low pressure switch.

Wouldnt the pressure switch prevent the outside fac from coming on?
It does run.

wetbar 08-04-2011 10:32 AM

Quote:

Originally Posted by JJboy (Post 700134)
Compressor:
Red - Yellow: 4.8
Yellow - Black: 2.8
Red - Black: ????

You can see on the label on the compressor RLA and LRA, check 14.5 amps is close to RLA.


the red black wires ohmed at 1.2

what does RLA and LRA stand for

Once again thanks for the help!

JJboy 08-04-2011 10:58 AM

RLA - Rated Load amps - Compressor running draw amps
LRA - Locked rotor amps - Amps do start the compressor

4.8 = 2.8 + (1.2)* 1.2 should be around 2

JJboy 08-04-2011 11:05 AM

[quote=wetbar;700137]
Quote:

Originally Posted by JJboy (Post 700134)
Check if your system has High/Low pressure switch.

Wouldnt the pressure switch prevent the outside fac from coming on?
It does run.

If the valves have electrical problem, yes. These valves will act like on/off switch by default pressures.

wetbar 08-04-2011 01:06 PM

So to test the l r a I would check the amp draw on the wire going to the capacitor?

Marty S. 08-04-2011 06:48 PM

Check the terminals at the compressor instead of using the wires. Turn the power off first of course. Double check the capacitor wiring. If it's still locked up call a tech to confirm but odds are the compressor is shot.


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