Daikin Condensing Unit DX13SN0241BB

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.

Was the coil flushed with water?

Select the cleaning method used

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

Was the coil rinsed 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?

Enter the reading from the multi-meter

Enter the actual value of the capacitor (i.e. the printed value on the capacitor)

Is the reading near to the actual value of the capacitor?

If the reading is significantly lower or none at all, is the capacitor 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?

Start Capacitor Check for Scroll Compressor Models

Is there a non-replaceable check valve located in the discharge line of the compressor?

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

WARNING: Hermetic compressor electrical terminal venting can be dangerous. When insulating material which supports a hermetic compressor or electrical terminal suddenly disintegrates due to physical abuse or as a result of an electrical short between the terminal and the compressor housing, the terminal may be expelled, venting the vapor and liquid contents of the compressor housing and system.

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.

This discharge can be ignited external to the compressor if the terminal cover is not properly in place and if the discharge impinges on a sufficient heat source.

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.

Ignition cannot occur at the venting terminal without the presence of contaminant air, and cannot occur externally from the venting terminal without the presence of an external ignition source.

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.

Is the compressor terminal protective cover and gasket properly in place and secured?

Is there any physical abuse or electrical short between the terminal and the compressor housing?