Daikin Cooling-Only Outdoor Unit RKS60F2V1B

EV connector correctly connected to the PCB

EV generates latching sound when power is turned off and on again

Continuity present when connector is disconnected and checked with a tester

Continuity between the pins 1 - 6 and 3 - 6

Continuity between the pins 2 - 5 and 4 - 5

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

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

Note: The latching sound varies depending on the valve type

Sign off on the electronic expansion valve check

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

Remove the 4 screws and lift the top panel. Take care not to cut your finger by the fins of the outdoor heat exchanger.

Remove the 4 screws and remove the discharge grille. Slide the discharge grille upwards and remove it. The discharge grille has 4 hooks.

Remove the 6 screws of the front panel.

Push the front panel and lift the shield plate to unfasten the hooks.

Unfasten the left side hooks, and then the right side hook.

Lift the front panel while pushing the left side panel inwards.

Lift the front panel and unfasten the right side hook.

When reassembling, fit the right side of the front panel first.

Warning: This check requires trained personnel with PPE!

Measure the power supply waveform between No.1 and No.2 on the terminal board

Upload a photo of the measured waveform

Is the power supply waveform a sine wave?

Is there waveform disturbance near the zero cross?

Sign off on the power supply waveform check

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) are output at the pins 1 - 4 when the fan motor is rotated 1 turn by hand

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

Remove the screw and remove the four way valve coil.

Warning: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)

Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Cautions for restoration: Restore the piping by nonoxidation brazing.

It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat. (Keep below 120°C.) For the sake of this, wrap the four way valve with wet cloth and provide water so that the cloth does not dry.

Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit.

When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.