New AC not cooling

[76argosy]

I just installed a new Coleman 4800 ac on restoration argosy. I turned over as directions instructed to install the drip pans. After installation per Coleman the unit will not cool. It started up great, fan works correct but I never hear the compressor or anything other than the fan. I’ve written the company waiting for response next week. Does anyone have suggestions or had this experience? Thanks

[Dspchef]

Do you have a wall mount thermostat and 3 wires coming in from the unit?

[jcanavera]

I just did some looking and that unit has controls probably mounted on the unit itself. So you need no connections to the wall thermostat most likely. I assume you have checked the following.

Connect the supply power black conductor to the black pigtail wire, the white conductor to the white pigtail wire and the supply ground conductor to the green pigtail wire found in the wiring box using the 3 provided wire nuts.

I'd also remove the cover for access behind the two knob rotatable switches and verity that the wiring plugs behind them are secure in their sockets. It could be the thermostat wire may not be plugged in which would mean that there would be no activation of the compressor. See drawing 10 in your instructions, assuming you are looking at the same thing which I see on line.


Jack

[BayouBiker]

If the fan runs but the compressor doesn't, I'm thinking the thermostat and controller are fine.

You can go two ways on this. One is to go with the warranty, but you may have to remove the unit, not fun. Possible they send out a tech and they find the issue. Third is while waiting, get your digital voltmeter out and do some troubleshooting. More likely than not you have a slight wiring issue or a problem with the contactor, start capacitor, thermo resistor or run capacitor circuits. It's not simple to diagnose but not difficult either. Which way do you want to go?

[76argosy]

I put factory drip pans, could turning over the unit while installing cause a vapor lock or something similar?

[BayouBiker]

No, the compressors are positive displacement and designed to compress vapor then the hot high pressure vapor is cooled and condensed to liquid in the condenser coils. You can spin it 12 ways from Sunday and do no damage. if it is an issue with the start or run coils (a single phase motor requires a capacitor to create a phase shift in the windings to get it to spin and keep it spinning). Could be a loose or miss-wire, since it's new that is what I'm thinking. Can you read a wiring diagram, and use a digital multimeter?

If the connections are mostly correct, the compressor will warm up to the touch but not spin if the start and run capacitor circuits are faulty. You can also use a wood dowel, place it on the compressor housing and hear a slight hum.

[76argosy]

Today I took off grill to make sure the wires/plug was intact. Everything looks as directions stated. I got on top of camper and I’m almost positive the compressor is not kickin in. I hear no change in sound when the thermostat is moved. Any suggestions and I’m waiting on Coleman to return email tomorrow

[chinclan1]

I’m not an expert on this topic, but do you have enough power going to the unit? Do you need 30 amp service to the argosy?

[CBWELL]

How long are you letting the unit run for? My A/C, a Penguin unit, takes about 2-3 minutes before the compressor starts. Are you supplying the trailer with 30 amp service?

[overlander63]

Depending on the model of the ceiling assembly, you may have to have a freeze sensor connected before the compressor will run.

[BayouBiker]

You can confirm if the compressor is running using a wood dowel or stick touch it to the compressor bottle the other to your ear. You should be able to hear it running. If you have the wiring diagram check for voltage on the motor leads and run capacitor.

[76argosy]

A big rookie mistake on my installation, I damaged the copper line on the manual thermostat. A big hats off thankyou to “out of doors mart” for their patience and customer service for the replacement part. Coleman Mach 3 works fine now. Thanks to all u guys too.

[Gkiesel]

Glad you got it resolved. I too have had good luck with the people at "Out of Doors mart"
Good place to do buisness.