Samsung AC030MNTDCH/AA - Heatsink Sensor Error;Heatsink over Heat

Samsung Electronics 4-37
4-4-14 Heatsink sensor error/Heatsink over heat
1.Checklist :
1) Are there screws assembly in PBA-heatsink?
2) Is the gap PBA-heatsink
3) Is the fan operation normal?
4) Is the cover assembly in control-box normal?
2. Troubleshooting procedure
Fastening the screw
No
Are there screws in PBA-heatsink?
(4 screws)
No
Check the fan connection
Change the Fan motor
Is the fan operation normal?
Exchange the Outdoor PBA
Restart after power off.
Yes
Yes
Yes