Daikin Cooling-Only Outdoor Unit RKN18KEVJU

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

Enter the play between the side face of the rotor and the bottom frame in mm

Fan motor and fan rotor reassembled correctly

Sign off on the fan motor / fan rotor removal

1. Check the connection of connector.

2. Check the motor power supply voltage output (pins 4 - 7).

3. Check the motor control voltage (pins 4 - 3).

4. Check the rotation command voltage (pins 4 - 2).

5. Check the rotation pulse (pins 4 - 1).

Fan motor wire breakdown / short circuit check

1. Check the connector for connection.

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

Remove the front grille according to the “Removal of Front Grille”.

1 Remove the screw and remove the drip proof plate.

3 Pull out the indoor heat exchanger thermistor.

4 Remove the screw of the ground.

5 Remove the screws of the connection wires.

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 successfully disconnected?

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

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

Thermistors disconnected from the PCB?

Measure the resistance of each thermistor using tester

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.

Thermistor disconnected from the PCB for direct mounted models?

Measure the resistance of the directly mounted thermistor

Sign off on the thermistor resistance check