Daikin Heat Pump Outdoor Unit RXS15LVJU

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

Disconnect the lead wires of the compressor.

Warning: Use caution to avoid burning yourself with pipes and other parts that are heated by the gas brazing.

Warning: If the refrigerant gas leaks during work, immediately ventilate the room. If refrigerant gas is exposed to flames, toxic gas may be generated.

Warning: If the refrigerant oil in the compressor catches fire, have a wet cloth prepared to extinguish the fire immediately.

Caution: For global environmental protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Remove the 2 nuts of the compressor.

With the power on, operation off, and the connector connected, check the following

Output voltage of about 5 V between pins 1 and 3

Generation of 3 pulses between pins 2 and 3 when the fan motor is operating

If NG in step 1 or 2, select the defective part

If OK in both steps 1 and 2 -> Replace the PCB

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

1 Remove the sound blanket (top upper).

2 Remove the sound blanket (top lower).

3 Remove the sound blanket (back).

4 Remove the sound blanket (outer).

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

Remove the 2 screws of the protection plate.

Remove the screws and remove the connecting wires and the power supply wires.

Remove the 2 screws of the conduit mounting plate.

Remove the conduit mounting plate.

Remove the 2 screws and remove the ground wire.

Pull out the outdoor temperature thermistor.

Remove the 4 screws of the right side panel.

Voltage between the pins 10 - 11

Hall IC generates the rotation pulse 4 times between the pins 10 -12, 10 - 13, when the fan motor is manually rotated once

Voltage of 320 ± 30 V is applied

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