Daikin Air Conditioner RK36NMVJUA

Warning: Ensure the power is off before starting the procedure

Voltage between (+) and (-) of the power module is approximately 0V

Disconnect the compressor harness connector from the outdoor unit PCB

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

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

Thermistors disconnected from the PCB

Measure the resistance of each thermistor using a multimeter

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

Indoor heat exchanger thermistor removed

Measure the resistance of the indoor heat exchanger thermistor

Sign off on the thermistor resistance check

Warning: This check requires trained personnel with PPE!

Measure the power supply waveform 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?

Upload a photo of the measured waveform

Sign off on the power supply waveforms check

Warning: Ensure that the voltage of 320 + 100 V ~ 320 - 50 V is applied

Set operation off and power off. Disconnect the connector S70 or S71

Control voltage between the pins 4 - 3

Rotation command voltage between the pins 4 - 2

Keep operation off and power off. Connect the connector S70 or S71

Number of rotation pulses at the pins 4 - 1 when the fan motor is rotated 1 turn by hand

Sign off on the rotation pulse check

Warning: This procedure requires trained personnel with PPE!

Main circuit checked for short circuit?

Warning: Never touch any live parts!

Warning: Ensure firm contact between the multimeter probes and the test points

Sign off on the capacitor voltage check