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.

1. Remove the horizontal blades.

2 Bend the horizontal blade slightly and release the center shaft. (2 locations)

Remove both the horizontal blades (upper and lower) in the same way.

4 Slide the horizontal blade to the left and release the right shaft.

1. Since the key pattern hook is provided, rotate the blade and fit it to the right shaft first.

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

Enter the resistance between the pins of the DB1

Is the resistance 'infinity' or less than 1 kW?

Sign off on the main circuit short check

1. Check that the voltage between the pins 10 - 11 is 15 VDC.

2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -12, 10 - 13, when the fan motor is manually rotated once.

Make sure that the voltage of 320 ± 30 V is applied.

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

2. Check that the voltage between the pins 4 - 7 is 320 VDC.

3. Check that the control voltage between the pins 3 - 4 is 15 VDC.

4. Check that the rotation command voltage between the pins 2 - 4 is 0 ~ 15 VDC.

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

Remove the front panel according to "Removal of the Air Filters / Front Panel".

You can remove the front grille without detaching the service cover.

1 Remove the screw and remove the service cover.

1 Remove the 3 screws of the front grille.

Refer to the removal procedure in a reverse way when reassembling.

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 the terminals (U,V,W) each other?

09/12 class: Activate power transistor test operation from indoor unit

FAN operation selected with the [MODE] button on the remote controller?