Recently replaced fan motor & capacitor. Fan works fine. The issue is that the compressor kicks in, runs fine & quiet for awhile then gets very noisy, amperage draw goes way up, then it trips the overload breaker on my inverter charger shutting all power off tothe trailer. What is preventing the compressor from shutting off? Considering connecting the original capacitor again.

1. You are not supposed to connect a hi amp appliance like a AC unit to the Inverter/Charger.2. I assume you are running ALL 120 loads thru the Inverter/Charger. Is this so?3. Compressor's that run normal then slowly increase the amp draw until the Breaker trips usually means a BAD compressor. Doug

You have described a clogged condenser coil. or restricted air flow in the area of the condenser coil.What is happening:As the A/C "Pumps" heat from inside (Evaporator) to outside (Condenser) if the condenser can not shed the heat fast enough the heat builds inside the system and pressure goes up. The compressor works harder and harder. The type of motor they use in the compressor the harder it works the more current it draws And finally CLICK.Clean the condenserNow on most (All but colemen) you remove the outer shroudThen you have to remove an inner cover.YOu can then access the "Back side" (Fan side) of the condenser. Take a look you will likely see it clogged.. If your hands are small enough you may be able to reach in and clean or use a long thin brush to clean gently (Be very gentle you do not want to mess up the fins).. Compressed air is also useful.On Coleman. You only need remove the outer cover since the fan sucks instead of blowing.

This does not look good. In the process of fan motor replacement I did take the opportunity to clean everything. Took the inner shroud off & cleaned the fins, clogged, using a soft brush & compressed air. Thoroughly cleaned fans while at it. Re the inverter charger. It has been installed for 8 years. Not your typical cheap RV unit. A Magnum 2000w pure sine wave unit. The draw on the leg that the AC is on goes up to 27 amps before breaker on the Magnum trips. So is a new AC unit in my future?

This should NOT be run through your inverter.Per your post, 27 amps times 120VAC= 3,240 watts. Even assuming 100% inverter efficiency, this is WAY overloading a 2000 watt inverter. Even on shore power, very much doubt the pass through relay is happy with that start up load.

Veebyes wrote:This does not look good. In the process of fan motor replacement I did take the opportunity to clean everything. Took the inner shroud off & cleaned the fins, clogged, using a soft brush & compressed air. Thoroughly cleaned fans while at it. Re the inverter charger. It has been installed for 8 years. Not your typical cheap RV unit. A Magnum 2000w pure sine wave unit. The draw on the leg that the AC is on goes up to 27 amps before breaker on the Magnum trips. So is a new AC unit in my future?Yes, more cost effective to replace unit. Your Inverter is used on MANY Motorhome units, in fact, LARGER Inverter/chargers. It is still not a good idea to run the AC circuit thru the Inverter system. While you do it and a lot do that, it is not the best way to run the electrical. Doug

Air conditioner woes | Good Sam Community

24 Replies

wolfe10
Explorer
May 29, 2019
This should NOT be run through your inverter.

Per your post, 27 amps times 120VAC= 3,240 watts. Even assuming 100% inverter efficiency, this is WAY overloading a 2000 watt inverter. Even on shore power, very much doubt the pass through relay is happy with that start up load.
Veebyes
Explorer II
May 29, 2019
This does not look good. In the process of fan motor replacement I did take the opportunity to clean everything. Took the inner shroud off & cleaned the fins, clogged, using a soft brush & compressed air. Thoroughly cleaned fans while at it. Re the inverter charger. It has been installed for 8 years. Not your typical cheap RV unit. A Magnum 2000w pure sine wave unit. The draw on the leg that the AC is on goes up to 27 amps before breaker on the Magnum trips. So is a new AC unit in my future?
wa8yxm
Explorer III
May 29, 2019
You have described a clogged condenser coil. or restricted air flow in the area of the condenser coil.

What is happening:
As the A/C "Pumps" heat from inside (Evaporator) to outside (Condenser) if the condenser can not shed the heat fast enough the heat builds inside the system and pressure goes up. The compressor works harder and harder. The type of motor they use in the compressor the harder it works the more current it draws And finally CLICK.

Clean the condenser

Now on most (All but colemen) you remove the outer shroud
Then you have to remove an inner cover.

YOu can then access the "Back side" (Fan side) of the condenser. Take a look you will likely see it clogged.. If your hands are small enough you may be able to reach in and clean or use a long thin brush to clean gently (Be very gentle you do not want to mess up the fins).. Compressed air is also useful.

On Coleman. You only need remove the outer cover since the fan sucks instead of blowing.
dougrainer
Nomad
May 29, 2019
1. You are not supposed to connect a hi amp appliance like a AC unit to the Inverter/Charger.
2. I assume you are running ALL 120 loads thru the Inverter/Charger. Is this so?
3. Compressor's that run normal then slowly increase the amp draw until the Breaker trips usually means a BAD compressor. Doug

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Air conditioner woes

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