AC problem

robkiller

So this is what I have. The relay does work and switches when I turn the ac on. This relay in the pic is outside on the condenser unit.

The fan won’t turn on nor can I hear a pump (don’t know if I should be able to)

The red and black wire at the bottom of the relay on pic right are each 120v lines. 2 Pole

The smaller blue and brown lead is the relay 24 volts its ok

The 2 yellow leads on top of that are 120v
the black next to them are 120v

everything coming off the relay is 120v

The shiny cap

All the leads off the cap are 120v
a set of brown and a yellow and black go to the pump
a set of brown and yellow and black go to the fan.

They won’t turn on but everything is showing 120v and good.

This system does not get used much at all and has not since last summer. Any ideas?

Attached Thumbnails

 

hvac instructor

check for 220volts on black and red wires to the contactor. thats power in from disconnect. do not check each wire to ground because you can have only 1 side of the 220 volts and it will read 110volts on both legs from a feedback. when contactor is pulled in check for 220 volts leaving contactor.
you might have 1 fuse bad at disconnect. capacitor doesnt look puffed up
from the photo.

robkiller

Ok what contactor do i need to hold my testing leads to?

hvac instructor

you called it a relay. the part to the right of the pic. the 2 wires on the bottom
is the power going to it. the 2 wires one on each side is the 24volt control
circiut. this will tell you if you have the 220volts coming in.

hvac instructor

FYI- contactors are normally open switches. relays can be normally open or closed

robkiller

ok i will check. Should i get 240 from the cap at anyplace? the cap is a ge 97f9895 370v

hvactech126

check across the incoming red and black wires. More than likely you have lost one leg of power. Check for fuses inside the disconnect. Stop checking line to ground. Doing so will not allow you to properly test for voltage.

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hvac instructor

the yellow wire from contactor is the 110v going to the cap. that doest go thruthe contacts. the cap only gets 110 volts and increases it to the comp and fan for extra voltage.

robkiller

This sounds dumb and i am sure it is. how do i test it for 240? i place my volt metter on ac volts and take the red wire placed it on the incoming termanal red and the black on the black incoming terminal. I get zero i am sorry i feel dumb how do i test for 240?

hvactech126

You did it correctly and this shows that you are missing 1 leg of power. Check for fuses in the disconnect. One is probably open. Test them for continuity.

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hvac instructor

you did good. it doesnt matter which meter lead goes on what wire.
if zero then follow wires to the disconnect and check same way on both side of the fuses. voltage might be off in the house

robkiller

I got it! it was one of the poles was not working. Thanks so much for the help!