Daikin Outdoor Heat Pump RXS20G2V1B

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

Thermistors disconnected from the PCB?

Enter the resistance of each thermistor

Select the model of the thermistor

For models directly mounted on the PCB, disconnect the connector for the PCB and measure

Connector for the PCB disconnected?

Enter the resistance of the thermistor

Sign off on the thermistor resistance check

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

Voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V?

Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

Compressor harness connector successfully disconnected?

Measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi-tester.

Enter the resistance measurement

Is the resistance measurement within the acceptable range?

Sign off on the power module check

EV connector correctly connected to the PCB

EV generates latching sound when power is turned off and on

Continuity present when connector is disconnected and checked with a tester

Check continuity between the following pins

Note: The latching sound varies depending on the valve type

Sign off on the electronic expansion valve check

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