Daikin Cooling-Only Outdoor Unit RKS36HVJU

Warning: This procedure requires trained personnel with PPE!

Voltage of 320 ± 30 V is applied

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

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

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

2 pulses (0 ~ 15 VDC) at the pins 1 - 4 when the fan motor is rotated 1 turn by hand

Warning: This procedure involves high voltage. Only trained personnel should perform it.

Install the inverter checker instead of a compressor

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

Warning: Do not touch the terminals (U,V,W) each other. High voltage is applied.

Power transistor test operation activated from the outdoor unit

Diagnose according to 6 LEDs lighting status

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

For the models in which the thermistor is directly mounted on the PCB, disconnect the connector for the PCB and measure.

Connector for the PCB disconnected?

Measure the resistance of the thermistor

Sign off on the thermistor resistance 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

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