Daikin Cooling-Only Outdoor Unit RKS20G2V1B

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

Untie the string and open the sound blanket (outer)

Remove the outer panels according to the “Removal of Outer Panels / Fan Motor”

Remove the electrical box according to the 'Removal of Electrical Box'

Lift and remove the sound blanket (outer)

Since the piping ports are torn easily, remove the sound blanket carefully.

Pull the sound blanket (inner) out

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

Removed the 2 nuts of the compressor?

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.)

Warning: Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet cloth so as to extinguish fire immediately.

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.

Restored 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.

Disconnected the brazed part where is easy to disconnect and restore?

Warning: This procedure requires trained personnel with PPE!

Control voltage between pins 3 - 4

Rotation command voltage between pins 2 - 4

2 pulses output at pins 1 - 4 when fan motor is rotated 1 turn by hand

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)

Sign off on the fan motor connector output check

Warning: Ensure that 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 ∞ or less than 1 kΩ?

Does a short circuit occur on the main circuit?

Sign off on the main circuit short check