Ecoair ECO906SQ Installation And Operation Manual page 17

Be sure that nothing obstructs the air outlet and intake vents.
Check that ground wire is properly connected or not. (Important)
Check that the
if remote is not working.
Check that the installation stand of the outdoor
unit is damaged or not. If damaged, please contact the dealer.
Turn main power off.
Clean the filter, clean the indoor and outdoor units' panels.
Clear dust and obstructions from the outdoor unit.
Repaint the rubiginous place on the outdoor unit to prevent it from
Adopt a special shield to cover the outdoor unit, avoid the rain water and dust from
entering the unit where possible.
Check before use
of the remote control changed
Maintain after use