Daikin Outdoor Heat Pump RXN24KEVJU

Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

1. Remove the horizontal blades.

2 Bend the horizontal blade slightly and release the center shaft. (2 locations)

Remove both the horizontal blades (upper and lower) in the same way.

4 Slide the horizontal blade to the left and release the right shaft.

1. Since the key pattern hook is provided, rotate the blade and fit it to the right shaft first.

Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Disconnect the refrigerant piping.

Preparation: Remove the electrical box according to the “Removal of Electrical Box / PCBs / Swing Motors”.

Caution: If the refrigerant leaks, repair the spot of leaking, then collect all refrigerant from the unit. After conducting vacuum drying, recharge proper amount of refrigerant.

Caution: In pump-down work, be sure to stop the compressor before disconnecting the refrigerant pipe. If the refrigerant pipe is disconnected with the compressor operating and the stop valve open, air may be sucked in and may generate an over-pressure in refrigeration cycle, thus resulting in pipe rupture or accidental injury.

Place a plastic sheet under the drain pan to prevent from wetting the floor with remaining drain.

If the drain hose is embedded in the wall, disconnect the drain hose beforehand.

Carry out the removal works with 2 wrenches.

When the pipings are disconnected, protect both the openings of pipe and unit from entering of moisture.

Warning: Disconnect the connectors of the thermistors from the PCB before proceeding

Thermistors disconnected from the PCB?

Enter the resistance of Thermistor 1

Enter the resistance of Thermistor 2

Enter the resistance of Thermistor 3

Refer to the table or graph for normal temperature and resistance relationship

Are the resistance readings within the normal range?

Sign off on the thermistor resistance check

Voltage between the pins 10 - 11

Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once

Set operation off and power off. Disconnect the connector S70

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

Keep operation off and power off. Connect the connector S70

Warning: This check requires trained personnel with PPE!

Measure the power supply waveform between No. 1 and No. 2 on the terminal board

Is the power supply waveform a sine wave?

Is there waveform disturbance near the zero cross?

Sign off on the power supply waveforms check