Daikin Condensing Unit DX11TA1203AA

Warning: This procedure requires trained personnel with PPE!

NOTE: The compressor may run backwards (noisy operation) for 1 or 2 seconds at shutdown. This is normal and does not harm the compressor.

Install gauges and verify that the suction pressure drops while the discharge pressure increases.

Listen for normal compressor sound levels. Reverse rotation results in elevated or unusual sound levels.

Reverse rotation will result in substantially reduced amp draw from tabulated values.

To correct improper rotation, switch any two power supply leads at the outdoor unit contactor.

The 3-phase scroll compressors are direction of rotation sensitive. They will rotate in either direction depending on the phasing of the power. There is no negative impact on durability caused by operating 3-phase compressors in reversed rotation.

The compressor’s internal protector will trip, de-energizing the compressor. Continued operation of 3-phase scroll compressors with the rotation reversed will contribute to compressor failure. All 3-phase scroll compressors should be checked for correct phase rotation.

Sign off on the 3-Phase Scroll Compressor Rotation Check

This unit is equipped with an aluminum tube evaporator coil.

The safest way to clean the evaporator coil is to simply flush the coil with water. This cleaning practice remains as the recommended cleaning method for both copper tube and aluminum tube residential cooling coils.

An alternate cleaning method is to use one of the products listed in the technical publication TP-109 (shipped in the literature bag with the unit) to clean the coils. The cleaners listed are the only agents deemed safe and approved for use to clean round tube aluminum coils. TP-109 is available on the web site in Partner Link > Service Toolkit.

Did you flush the coil with water?

Select the cleaning method used

NOTE: Ensure coils are rinsed well after use of any chemical cleaners.

Did you rinse the coils well after cleaning?

WARNING: Discharge capacitor through a 20 to 30 OHM resistor before handling.

NOTE: You can do this test with a multi-meter if you have a Capacitance meter on your multi-meter.

Capacitor removed from the circuit

Multi-meter set to 'Capacitance'

Capacitor terminals connected to the multi-meter leads

Actual value of the capacitor (i.e. the printed value on the capacitor)

Reading is near to the actual value of the capacitor

Capacitor is dead and must be replaced

Warning: This procedure requires trained personnel with PPE!

Run capacitor wired across the auxiliary and main windings?

Is the torque characteristics of the motor improved?

Is the line side of the capacitor marked with 'COM'?

Is the capacitor wired to the line side of the circuit?

Is the hard start kit approved by Amana® brand or Copeland?

Is the discharge check valve closing off high side pressure to the compressor after shut down?

Is the compressor equalizing through the scroll flanks?

WARNING: Hermetic compressor electrical terminal venting can be dangerous.

If the compressor terminal PROTECTIVE COVER and gasket (if required) are not properly in place and secured, there is a remote possibility if a terminal vents, that the vaporous and liquid discharge can be ignited, spouting flames several feet, causing potentially severe or fatal injury to anyone in its path.

Ignition of the discharge can also occur at the venting terminal or inside the compressor, if there is sufficient contaminant air present in the system and an electrical arc occurs as the terminal vents.

Therefore, proper evacuation of a hermetic system is essential at the time of manufacture and during servicing.

To reduce the possibility of external ignition, all open flame, electrical power, and other heat sources should be extinguished or turned off prior to servicing a system.

Compressor terminal PROTECTIVE COVER and gasket properly in place and secured?

Proper evacuation of a hermetic system performed?

All open flame, electrical power, and other heat sources extinguished or turned off prior to servicing?

Sign off on the compressor check