Daikin Cooling-Only Outdoor Unit RKN12KEVJU

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

A high voltage is applied to all the electric circuits of this product including thermistors.

When a signal from the remote controller is received, the receiving tone sounds and the operation lamp flickers immediately to confirm the signal reception.

When the ON/OFF button is kept pressed for 5 seconds, the forced cooling operation is performed for about 15 minutes.

1 Open the front panel to the position where it stops.

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

1. Disconnect the connecting wires.

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

1 Remove the screw of the service cover.

2 Pull out the service cover down in the direction of the arrow.

3 The figure shows the connections of wire harnesses.

4 Remove the screw of the wire retaining plate.

5 Loosen the screws of the terminal board and disconnect the connecting wires.

Warning: This procedure requires trained personnel with PPE!

Is the EV connector correctly connected to the PCB?

Turn the power off and on again, did the EV generate latching sound?

If the EV does not generate latching sound, proceed to the next step

After disconnecting the connector, did the tester confirm continuity?

Check the continuity between the pins

If there is no continuity between the pins, the EV coil is faulty

If the continuity is confirmed, the outdoor unit PCB is faulty

Sign off on the electronic expansion valve 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)

Fan motor wire breakdown / short circuit check

Check the connector for connection

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

1. Remove the right side panel.

Remove the indoor heat exchanger according to the “Removal of Indoor Heat Exchanger”.

1 Remove the screw of the right side panel.

2 Unfasten the hook of the right side panel.

2. Remove the fan rotor and the fan motor.

1 The fan motor has 3 projections on the right side.