Daikin Outdoor Heat Pump RXN12KEVJU

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.

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

Compressor harness connector disconnected from the outdoor unit PCB

Measure resistance between the terminals of the DB1

Measure resistance between the terminals of the compressor

Evaluate the measurement results for a judgment

Sign off on the power module check

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

Unfasten the center shaft while bending the horizontal blade slightly.

Cautions for reassembling: Since the key pattern hook is provided, rotate the horizontal blade and fit it to the right shaft first.

Fit the horizontal blade to the center and left shafts.

Unfasten the left shaft of the horizontal blade.

Unfasten the right shaft of the horizontal blade.

Sign off on the blade removal process

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

Removed the 2 screws, which fix the front grille to the main body.

The front grille has 3 hooks on the upper part.

Pressed each hook, and also lifted the grille up to unfasten the hooks.

Pulled the upper part of the front grille out and lifted the lower part up, and then removed the front grille.

The convex marks (...) on the front panel indicate the position of the hooks.

When reassembling, made sure that all the 3 hooks are fastened as they were.

Sign off on the front grille removal