Daikin Outdoor Heat Pump RXS36HVJU

Warning: Check the main circuit for short circuit before proceeding

Main circuit checked for short circuit?

Warning: Be careful never to touch any live parts.

Voltage reading of the capacitor

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

Measure the power supply waveform between No. 1 and No. 2 on the terminal board

Check to see if the power supply waveform is a sine wave

Check to see if there is waveform disturbance near the zero cross

Sign off on the power supply waveforms check

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

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?

Follow the procedure below to measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi-tester.

Enter the resistance measurement between the terminals of the DB1 and the terminals of the compressor

Resistance measurement within acceptable range?

Sign off on the power module check

Warning: This procedure requires trained personnel with PPE!

Install the inverter checker instead of a compressor

Charged voltage of the built-in smoothing electrolytic capacitor dropped to 10 VDC or below?

Terminals removed from the compressor?

Terminals connected to the terminals of the inverter checker without touching each other?

Activate power transistor test operation from the outdoor unit

Pressed the forced cooling operation ON/OFF button for 5 seconds?

Diagnose according to 6 LEDs lighting status