Samsung AC036MNTDCH/AA - Gas Leak Error

Samsung Electronics 4-43
4-4-20 Gas leak error
1.Checklist :
1) Is the position of indoor Eva_in sensor normal?
2) Check the pipe crack
3) Check the EEV valve connection in Outdoor unit
4) Check the refrigerant was charged
2. Troubleshooting procedure
Indoor sensor take the normal position
Check the pipe crack.
Fill up the refrigerant.
No
No
Is the position of indoor eva_in sensor normal?
No
No
No
Terminate the service.
Change the EEV valve
Connect the EEV valve.
Is the gas leak error appeared again?
Is the EEV valve connection normal?
Is the EEV valve is operation?
Check the sound of EEV valve after power on.
Is the pressure of refrigerant normal?
Exchange the Indoor PBA
Exchange the Outdoor PBA
Restart after power off
Check the EEV valve operation.
Yes
Yes
Yes
Yes
Yes
Yes
Yes