Daikin Indoor Cooling/Heating Unit FXMQ24PAVJU

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

Warning: This procedure requires trained personnel with PPE!

Check Electronic Expansion Valve Coil

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

Measure the resistance value between White and Yellow

No continuity between White and Yellow

Measure the resistance value between White and Orange

Resistance value between White and Orange is approx. 300 Ω

Measure the resistance value between White and Red

Resistance value between White and Red is approx. 150 Ω

Overload control causing insufficient cooling capacity

Superheated degree of suction gas

Compressor lower in discharge pipe temperature despite of pressure loads

In heating, the temperature of discharge air through the subcooled section becomes lower

Superheated degree of suction gas

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 leaving the compressor in vacuum state?

Enter the amount of refrigerant charged

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