Daikin Condensing Unit DX13SA0361AE

Check for 230 volts to the motor connections L and N

Check for 24 volts from terminal C to either terminal 1, 2, 3, 4, or 5

If voltage was present in steps 1 and 2, the motor has failed and will need to be replaced.

Note: When replacing motor, ensure the belly band is between the vents on the motor and the wiring has the proper drip loop to prevent condensate from entering the motor.

WARNING: HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

Remove the leads from the compressor terminals. See warnings S-17 before removing compressor terminal cover.

Fuse, circuit breaker, ground fault protective device, etc. has not tripped.

Enter the reading for continuity between terminals S-R

Enter the reading for continuity between terminals C-R

Enter the reading for continuity between terminals C-S

If either winding does not test continuous, replace the compressor.

NOTE: If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor.

Sign off on the resistance test

WARNING: To avoid the risk of fire or explosion, never use oxygen, high pressure air or flammable gases for leak testing of a refrigeration system.

WARNING: To avoid possible explosion, the line from the nitrogen cylinder must include a pressure regulator and a pressure relief valve. The pressure relief valve must be set to open at no more than 150 psig.

Pressure regulator and pressure relief valve installed?

Enter the pressure relief valve setting

Pressure test with dry nitrogen and soapy water performed?

Describe the location of the leaks

Repeat pressure test performed?

WARNING: HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

The high pressure control capillary senses the pressure in the compressor discharge line. If abnormally high condensing pressures develop, the contacts of the control open, breaking the control circuit before the compressor motor overloads. This control is automatically reset.

Using an ohmmeter, check across terminals of high pressure control, with wire removed. If not continuous, the contacts are open.

Attach a gauge to the dill valve port on the base valve.

WARNING: Line Voltage now present.

Start the system and place a piece of cardboard in front of the condenser coil, raising the condensing pressure.

Check pressure at which the high pressure control cuts-out. If it cuts-out at 610 PSIG ± 10 PSIG, it is operating normally

(See causes for high head pressure in Service Problem Analysis Guide). If it cuts out below this pressure range, replace the control.

Sign off on the high pressure control check

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