Daikin Indoor Cooling/Heating Unit FXUQ30PVJU

Warning: This procedure requires trained personnel with PPE!

Compressor PI control in cooling

Low pressure protection control

Superheated degree control by indoor unit electronic expansion valve in cooling

Superheated degree control by outdoor unit electronic expansion valve in heating

Enter the high pressure reading

Remove the connector for electronic expansion valve (X7A) from PCB

Check continuity between White and Yellow

Measure resistance value between White and Orange

Measure resistance value between White and Red

Measure resistance value between Yellow and Blue

Measure resistance value between Yellow and Brown

Sign off on the Electronic Expansion Valve Coil Check

Superheating temperature control in cooling is conducted by indoor unit electronic expansion valve

Superheating temperature control in heating is conducted by outdoor unit electronic expansion valve (main)

Judgement criteria of superheat operation:

Discharge gas superheated degree

Is the suction gas superheated degree 10°C (50°F) and over?

Is the discharge gas superheated degree 45°C (113°F) and over, except immediately after compressor starts up or is running under drooping control?

Sign off on the superheat operation check

Warning: This procedure requires trained personnel with PPE!

Choose the type of vacuuming and dehydration

Vacuum pump enables vacuuming down to –100.7 kPa (–14.6 psi)?

Enter the vacuum pump run time in hours

Degree of vacuum reached –100.7 kPa (–14.6 psi) or less?

Leak tests conducted if vacuum did not reach –100.7 kPa (–14.6 psi) or less after 3 hours?

Compressor left at the degree of vacuum of –100.7 kPa (–14.6 psi) or less for a period of 1 hour or more?

Vacuum gauge reading did not rise after 1 hour?

Enter the amount of refrigerant charged

Warning: Ensure power is OFF before starting the procedure

All wiring removed from the PCB

Wait for 10 minutes before proceeding

Measurement mode for analog multimeter

Measurement in diode check mode for digital multimeter