Installing the indoor unit
All interconnecting wiring between indoor and outdoor unit must be performed by a licenced electrical contractor in accordance with AS/NZS3000.
the unit to 
screws adequately to prevent loosening.
Ensure the electrical connections are properly earthed to prevent electrical shocks.
Ensure all wiring connections are secure and the cover plates are reinstalled properly. Poor installations that allow dust or moisture incursion may cause fire or electrocution.
A circuit breaker of adequate capacity should be installed at the switchboard.
output 
Nm
ensure the joint nut is adequately tightened, 
