I went out tonight to look at a small Rheem split system. I think it was
2 ton manufactured in 1991. Copeland Hermi.The compressor wasn't running, OFM was.
Single phase 240 V.
I kill the power and check the compressor. Good resistance from each terminal to one another. About 1 ohm between the two hots and 4 ohms from one to the start winding. No shorts to ground.
This setup has a dual cap for the fan and comp. There also appears to be a factory hard-start built in. The hard-start relay showed closed (as it should) with the system powered down.
Put power back to the thing and I don't hear a darn thing but it won't run. I never even heard it try to start. 240 V to both run terminals and
240 V between one run and the start. The other run to start showed about 15.I don't know if the internal O/L's are working that fast or what's up. I suspect a start or run cap... but I thought I'd get some more opins.
I didn't have the time rip the cap out of the cabinet... Rheem made it a pain (Payne for Johnny) on this unit. I'll check it next tomorrow or so...
Why the heck would a internal trip that fast? I can't even see a current draw when it should be trying to start.
Any suggestions?
Jake