Daikin Cooling-Only Outdoor Unit RKS50E2V1B

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

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

Sound blanket (top upper) removed

Sound blanket (top lower) removed

Discharge pipe thermistor released

Warning: Be careful not to lose the clip for the thermistor.

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.

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.

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

2 pulses (0 ~ 15 VDC) are output at the pins 1 - 4 when the fan motor is rotated 1 turn by hand

With the power on, operation off, and the connector connected, check the following

Output voltage of about 5 V between pins 1 and 3

Generation of 3 pulses between pins 2 and 3 when the fan motor is operating

If NG in step 1 or 2, select the defective part

If OK in both steps 1 and 2, select the part to replace

Disconnect the connectors of the thermistors from the PCB

Thermistors disconnected successfully

Measure the resistance of each thermistor using tester

Check the relationship between normal temperature and resistance

Upload the graph showing the relationship between temperature and resistance

Sign off on the thermistor resistance check