Daikin Outdoor Heat Pump ARXS20G2V1B

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

Release the discharge pipe thermistor

Be careful not to lose the clip for the thermistor.

Pull out the outdoor heat exchanger thermistor

Be careful not to lose the clip for the thermistor.

Warning: This procedure requires trained personnel with PPE!

Control voltage between pins 3 - 4

Rotation command voltage between pins 2 - 4

2 pulses output at pins 1 - 4 when fan motor is rotated 1 turn by hand

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 disconnected from the outdoor unit PCB?

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

EV coil is not faulty if there is continuity between the pins

Outdoor unit PCB is not faulty if continuity is confirmed

Note: The latching sound varies depending on the valve type

Sign off on the electronic expansion valve check

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

Thermistors disconnected from the PCB?

Measure the resistance of each thermistor

Select the model of the thermistor

Upload a photo of the tester reading

Sign off on the thermistor resistance check