Daikin Indoor Cooling/Heating Unit FXMQ15PBVJU

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

Superheated degree of suction gas

Superheated degree of suction gas

Electronic expansion valve open?

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

Enter the superheating temperature in cooling

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

Enter the superheating temperature in heating

Judgement criteria of superheat operation: Suction gas superheated degree: 10°C (50°F) and over. Discharge gas superheated degree: 45°C (113°F) and over, except immediately after compressor starts up or is running under drooping control

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

Normal vacuuming and dehydration

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

Enter the vacuum level after 2 hours of vacuuming

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

Leak tests conducted if vacuum level does not reach –100.7 kPa (–14.6 psi) after 3 hours

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

Check if the vacuum gauge reading does not rise after leaving the compressor in vacuum state for 1 hour

Enter the amount of refrigerant charged

Special vacuuming and dehydration - In case of moisture may get mixed in the piping