Midea MCD-18HRFN1-QRC8 - For the unit with TWINS function(For the super-slim cassette & A5 duct); Communication malfunction between master unit and indoor unit; Other malfunction between master unit and indoor unit

Troubleshooting
Electrical Control System 137
2.4.3 For the unit
with TWINS function(For the super-slim cassette & A5 duct)
2.4.3.1 Communication
malfunction between master unit and indoor unit
2.4.3.2 Other malfunction
between master unit and indoor unit
One indoor unit displays ”F4”, which means another indoor unit is faulty. Check another indoor unit’s error
code and then follow the appropriate solutions to solve the malfunction.