Daikin Outdoor Heat Pump ARXS25G2V1B

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

1. Remove the reactor. Preparation

Remove the outer panels according to the “Removal of Outer Panels / Fan Motor”.

Remove the electrical box according to the "Removal of Electrical Box".

1 Remove the screw and remove the reactor.

2 The partition plate has a hook on the lower side. Lift and pull the partition plate to remove.

When reassembling, fit the lower hook into the bottom frame.;

Warning: This procedure requires trained personnel with PPE!

Enter the power supply waveform measurement 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

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

Preparation: Remove the panels and disconnect the connector for the fan motor according to the “Removal of Outer Panels / Fan Motor”.

Disconnect the 2 connectors for the reactor.

Disconnect the connector for the compressor [S30].

When reassembling, coil the excessive lead wire and hang the loop on the hook.

Disconnect the connectors for the magnetic relay [S50] and for the thermistors [S90].

Disconnect the connectors for the filter PCB [S10] and for the overload protector [S40].

Disconnect the connectors for the electronic expansion valve coil [S20] and for the four way valve coil [S80].

Check the connection of connector

Check the motor power supply voltage output (pins 4 - 7)

Check the motor control voltage (pins 4 - 3)

Check the rotation command voltage (pins 4 - 2)

Check the rotation pulse (pins 4 - 1)

Sign off on the fan motor connector output check

Warning: Ensure the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking.

Enter the voltage between (+) and (–) of the diode bridge (DB1)

Measure the resistance between the pins of the DB1.

Enter the resistance between the pins of the DB1

Is the resistance ∞ or less than 1 kΩ?

If the resistance is ∞ or less than 1 kΩ, short circuit occurs on the main circuit.

Sign off on the main circuit short check