Question about Dometic Rooftop RV Air Conditioner

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Air conditioner The ac was running great, my husband turned it off now it will not turn on...we have had a problem with the generator cutting out when turning on a load, but the ac will not even turn...we just bought the rv and see the ac needs a good cleaning and we are going to clean the carb...could the problem be connected or is there a reset button, we did check the fuses and they seem ok...any advice would be appreciated.

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  • 83 Answers

Airconditioner compressors has so little voltage tolerance, if voltage is lower than its rated, it will not run at all. I suggest you let the generator run at full first before turning on your airconditioning.

Posted on May 08, 2009

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Generator


Your question doesn't make sense as it is written, but if the real question is what size generator do you need to start the air conditioner I might offer the following....

Look on the air conditioner product label and you will find information concerning the supply voltage and current. This is a 2 ton unit and it probably requires 220VAC power. Also on the label will be a value for the maximum OPD (over current protection device). This indicates the maximum fuse or circuit breaker that can be installed in the power feeder line for the air conditioner. You will need a generator that is capable of supplying this amount of current during the start up of the air conditioner. The value is usually about 2-1/2 times the normal operating current that the generator will need to supply continuously. This is because the air conditioner is full of motors that draw a lot of current when starting up. If the generator can't supply sufficient start up current, the motors will not start and the AC will not operate. As a result, the generator size is usually relatively large in comparison to the actual size required to keep the AC running after start up. This is also why AC units are not typically powered from generator power. Good Luck!

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1 Answer

Recently purchased a 4400W generator to operate travel trailer primarily and on occasion my ac unit. Connected the generator to the travel trailer, then ran the a/c, everything going well, then the circuit...


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seth

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1 Answer

Run ac off of generator.


you need to use a volt meter and test which lead from the 4 wire output of the generator a 220 v is coming out.

the round center prong of the ac is its ground and should not be connected to any live power. it could be left unused.

tnx 4 using fixya,

drcool


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Its the watts you plug in too like ither 30 watts vs 50 watts. 30 watts will cause your wires to get hot in the unit. just pull down your breaker box and look at those white ground wires.

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