Daikin Air Conditioner RK36NMVJU

Check the connection of connector

Check the motor power supply voltage output

Check the motor control voltage

Check the rotation command voltage

Sign off on the connector output check

Warning: This procedure requires trained personnel with PPE!

Main circuit checked for short circuit?

Warning: Never touch any live parts during the procedure.

Note: The surface of the test points (DC–) may be covered with the coating.

Firm contact between the multimeter probes and the test points?

Sign off on the capacitor voltage check

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

Thermistors disconnected from the PCB?

Note: The room temperature thermistor is soldered on the PCB

Connector to the control PCB disconnected before measuring the resistance?

If the connector of indoor heat exchanger thermistor is soldered on the PCB, remove the thermistor before measuring the resistance

Indoor heat exchanger thermistor removed and resistance measured?

Sign off on the thermistor resistance check

Warning: Ensure the voltage between (+) and (-) of the diode bridge (DB1) is approximately 0 V before proceeding

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

Measure the resistance between the pins of the DB1 referring to the table below

Enter the resistance between the pins of the DB1

Is the resistance less than 1 kOhm?

If the resistance is less than 1 kOhm, a short circuit occurs on the main circuit

Sign off on the main circuit short check

Warning: Ensure the voltage between (+) and (–) of the power module is approximately 0 V before proceeding

Disconnect the compressor harness connector from the outdoor unit PCB

Compressor harness connector disconnected successfully?

Press the protrusion on the connector to disengage it

Connector disengaged successfully?

Measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter

Sign off on the power module check