Daikin Indoor Cooling/Heating Unit FXAQ07PVJU

Warning: This procedure requires trained personnel with PPE!

Electronic Expansion Valve Coil checked

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

Measure the resistance value between pins

No continuity between White and Yellow

Resistance value between White and Orange

Resistance value between White and Orange is approx. 300 Ω

Resistance value between White and Red

Resistance value between White and Red is approx. 150 Ω

Check for High Pressure in cooling

Check for High Pressure in heating

Check for broken wire of the relay wire (p.299)

Procedure for checking outdoor-outdoor unit transmission wiring for broken wires

Procedure for checking indoor-outdoor unit transmission wiring for broken wires

Check Fan Motor Connector (Power Supply Cable) (p.300)

Check Fan Motor Connector (Signal Cable) (p.300)

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 level after 2 hours of evacuation

Did the vacuum level reach –100.7 kPa (–14.6 psi) after 2 hours?

Enter the vacuum level after additional 1 hour of evacuation if needed

Did the vacuum level reach –100.7 kPa (–14.6 psi) after 3 hours?

Enter the vacuum level after leaving the compressor in vacuum state for 1 hour

Warning: Ensure power is OFF before starting the procedure

All wiring removed from the PCB

Power supply turned OFF and 10 minutes or more have passed

Measurement mode for analog multimeter

Measurement mode for digital multimeter is diode check mode

Sign off on the power transistor check

Warning: This procedure requires trained personnel with PPE!

Enter the compressor capacity control

Refer to Compressor PI control for details

Low pressure protection control functional?

Hot gas bypass control functional?

Enter the superheated degree control of indoor unit electronic expansion valve

Enter the superheated degree control of outdoor unit heat exchanger