2002 Winnebago Adventurer 32v.
30 amp power.
Purchased in 2020 used in excellent condition, never had any issues with cooling.
I've taken it on 3 trips this summer; first was memorial day and weather was cool and AC seemed to be working fine. Second was late June during a cool spell and AC was barely needed during the day and not at all during the night, appeared to be working fine.
Third trip was two weeks ago and AC did not work well at all.
Like usual I went to get it out of parking, fired up the generator and started the AC. I started taking wheel covers off and getting ready to take to my house and it seemed like AC took a lot longer to come on than it usually does. While at home I plugged it into a dedicated 20amp outlet that only has our garage door on it and set my EMS to 20amps and ran the AC overnight to make sure the coach was cool in the morning. We were going in and out a lot but in the morning I woke up and the coach was a nice 70degrees.
The 3 hour drive to my parent's lake house was miserable. The generator was running but the AC could not keep up. It was mid 90s out and mid 80s in the coach. We had cool air coming out but not blasting out like usual.
When I got to my parent's house hooked up to their dedicated 20amp outlet with nothing on it, set my EMS to 20amps and turned the AC on. The fan came on, compressor 1 came on then compressor 2 tripped the breaker in their house. Reset the breaker and same thing, this had never happened before. Before I reset the home breaker I had noticed the breaker in my load panel in the coach was tripped. See pic below. This is labeled as the AC Circuit #2.
I then figured out if I left this breaker in the coach in the off position that it would not trip the 20amp circuit in the home and the unit ran all weekend on just the 1 compressor, which was not great but kept the coach a decent temp and cooled right off at night.
As we prepared to go home I started the generator and at that time noticed this breaker was tripped. It must have been tripped the whole way down on Friday.
It would not reset until I shut the generator off. I reset it, fired up the generator, disconnected from the shore power and then fired up the AC. After a minute or two the fan came online, then the generator throttled up a bit and the compressor 1 came online. About a minute or less later the generator throttled up again but then the 20amp circuit in the gen tripped immediately. We drove the whole way home and it was miserable, 90+ and humid out and very hot in the RV. Kids and wife were not happy.
When I got home I did some trouble shooting. Opened up the panel on my air conditioner. I have verified with my multi meter that i have 120v at both the lines in below the AC circuit board so it appears my stage 1 and stage 2 have power to them.
On the suggestion of others I replaced my start capacitors with new ones that included the PTCR kits. I fired up the generator and again confirmed that the power to the AC unit was 120v at both 1st and 2nd stage.
I turned the fan to "on" and the blower fired right up. I then set the fan to Auto, turned the thermostat to Cool and waited. I was outside while I told my son to watch the EMS panel. He thinks he saw the panel jump for a second or two to 23-24 amps then settle down to 17-18. Cool air was coming out of the vents but not blasting out. About 1 minute later he thinks he saw 50amps for a second and the 20amp circuit on the generator tripped. Then checking my multi meter there is no power to the 2nd stage coming into the AC unit.
Looking at the AC panel while it was running I do have 1 red light but did not pay attention to what it means.
Today I went over to my rig and took off my power transfer case cover. All the wires look good, no signs of a short anywhere and all the wires are tight.
Posting in IRV2 is has been suggested this could still be a bad run capacitor. I may just order 2 new ones as mine are most likely 20 years old. Or I could try swapping the stage 1 and 2 power lines from the capacitors/relays making my stage 2 now my stage 1 and vice versa. If that happens I would expect the 20amp breaker in my coach to trip if my compressor is bad (the one on the far left in the at the start of the thread labeled AC unit 1). If after the swap the compressor fires up then I would assume that would indicate the trouble is in either the capacitor or the relay.
If anyone has any other suggestions I might try or trouble shooting I am missing any help would be greatly appreciated.