Air Conditioners

RV Air Conditioners are complicated appliances that require 3 systems to function correctly in order to properly cool the unit

**BrandCompressor Wire Color

Atwood Air CommanderBLACK

ColemanPURPLE

DometicBLUE

FurrionBLUE

GEBLACK

Compressor AmpsTemp at A/C Outdoor Coil

(Rated Load Amps) - 165°

Rated Load Amps (~ 11 Amps)75°

(Rated Load Amps) + 185°

(Rated Load Amps) + 295°

(Rated Load Amps) + 3105°

(Rated Load Amps) + 4115°**

###### A/C runs but doesn't cool (Low Refrigerant Test)

BrandCompressor Wire Color

ColemanPurple

DometicBlue

FurrionBlue

GE**Black

Compress AmpsTemperature at AC Outdoor Coil**

(Rated Load Amps) - 165° F

Rated Load Amps (~11 amps)75° F

(Rated Load Amps) + 185° F

(Rated Load Amps) + 295° F

(Rated Load Amps) + 3105° F

(Rated Load Amps) + 4115° F

• Perform Delta T test, Record your measurements & results

• Record outside temp

• Find the RLA (Rated Load Amp) on the data tag

• This is the the expected amp draw of the model at 75° F and 50% Humidity it will vary from model to model

• As a rule of thumb the RLA will go up or down 1 Amp for every 10°

• Take an amp draw after 15 minutes of compressor running

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Your Delta 20 should be at least 20° and your amperage on the compressor wire should be pretty close to the RLA for your given temperature.

If your Delta 20 is below 20°, and the amp draw is significantly lower than expected this indicates a refrigerant leak.

Causes:

1, dirty coils and air filters

• re-circulation of cold air into the return side of the air conditioner

• using automatic or low fan speeds in higher humidity and ambient temperatures

• restricted ducting or restriction in air flow

• air-conditioner empty or low on charge

• freeze control defective or improperly placed

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Compressor

Fan Motor

Thermostat Wire

Delta 20 Temp Drop Test