BEFORE RESETTING ERROR CODE

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STEP 1: Ensure the unit is in COOL Mode

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STEP 2: Check Refrigerant Pressure

TIPS:

• Pressure should be equal to outdoor temperature on a PT Chart

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STEP 3: If pressure is lower than outdoor temp, go to Step 1 of the next section (If the unit is undercharged...)

TIPS:

• The system is likely low on refrigerant (under-charged).

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STEP 4: If pressure is equal to outdoor temp: Reset code by hard shut down​

TIPS:

• Remove disconnect or turn off the breaker for 10 to 15 minutes.​

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STEP 5: Turn power back on and check pressure​

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STEP 6: If pressure below 100PSI, go to Step 9​

TIPS:

• Pressure should drop below 100psi, then come back up over 100 PSI.

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STEP 7: If pressure not below 100PSI, go to Step 8​

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STEP 8: Check Indoor Coil Temperature Sensor​

TIPS:

• See Thermistor Temperature to Resistance Table

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STEP 9: Check the Expansion Valve​

TIPS:

• Check for corrosion on the EVV stem, Check for corrosion on the Ohm EEV coil.

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STEP 10: Check for restrictions​

TIPS:

• Perform a 4-Point Temperature check.

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STEP 11: Check the temperature on both sides of the strainer. If there’s a temperature difference, the strainer may be clogged.​

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IF UNIT IS UNDERCHARGED

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STEP 1: Recover and weigh out the charge​

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STEP 2: Compare the amount removed to the factory charge listed on the data plate plus additional charge for line-set length​

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STEP 3: Locate and repair the leak

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STEP 4: Minimum triple evac

​TIPS:

• Pull Vacuum, break vacuum with 100psi nitrogen 3 times, then pull the final vacuum.

 

STEP 5: ​Pull under 300 microns

TIPS:

• Once 250 to 300 Microns is achieved, isolate the pump from the micron gauge, shut off the pump, make sure the system is sealed.

 

STEP 6: Weigh in the proper charge while under vacuum.​