[Gerber]

Trane PTAC unit will run for anywhere from 10 to 30 min, then trip the ground fault switch on the cord at the outlet. Does this in both heating and cooling. Owner says they have to let it sit a while, then hit the reset button and it will restart. Any ideas?

 

[keeplearnin]

Compressor grounding out, have you checked the windings?

 

[Gerber]

I am confused because it does the same thing in heat mode w the electric strips on, or with fan only on.

 

[baub]

Megger out the fan motor and compressor.

 

[Gerber]

What is megger

 

[AddMore22]

A megger is a device that connect to the compressor and send voltage through the winding to check the resistance.

 

[Kon99lbi]

Owner says they have to let it sit a while, then hit the reset button and it will restart. Any ideas?

Will it trip the GFI again after another 10-30 min or does it then run fine?

 

[keeplearnin]

Is this a new install?

 

[Gerber]

It never runs very long at any given time, unit is 6-7 yrs old.

 

[keeplearnin]

Isn't this unit a heat pump?

 

[Williamsma]

I have had this problem before but with under counter reach-ins at coffee kiosks at supermarkets. Sparky installs a GFI for the reach-in and works with no problems for 2-3 years. Than it starts tripping the GFI. I find no shorts, leaking capacitors, or any high resistance path to ground. Plug the reach-in in a non-GFI recepticle and the unit runs 24/7 with out any problems. I have sparky install a new GFI and problem goes away. If you are not showing anything shorted, change the GFI. They do go bad.

 

[keeplearnin]

I have had this problem before but with under counter reach-ins at coffee kiosks at supermarkets. Sparky installs a GFI for the reach-in and works with no problems for 2-3 years. Than it starts tripping the GFI. I find no shorts, leaking capacitors, or any high resistance path to ground. Plug the reach-in in a non-GFI recepticle and the unit runs 24/7 with out any problems. I have sparky install a new GFI and problem goes away. If you are not showing anything shorted, change the GFI. They do go bad.

Ahhhhhh excellent point, sometimes we get tunnel vision.

 

[royd2]

i agree probably a bad gfi.

 

[Gerber]

Checked electric heat strip, ok. Replaced cord that included the gfi, seems to have eliminated the problem.

 

[furnacemaninc]

I had a hot tub pump do that and it ended up being the outlet

 

[stephy]

Well I'm glad you followed up on letting us know.......

Just what I thought.......lol......

I think they are all made by Gooman now.......

I know a grouchy old bastard that some how has lasted several years.......

PM me for his numbers........