36Grounding workIf the power distribution circuit does not have a grounding or the grounding does not comply withspecifications, a ground rod must be installed.The corresponding accessories are not supplied with the air conditioner.1) Select a grounding rod that complies with the specifications given in the illustration.Compressed ring terminal(Terminal M4)PVC-insulated green/yellow wireCopper wireCarbon rod2) Select a proper place for the grounding rod installation.- In damp hard soil rather than loose sandy or gravel soil that has a higher grounding resistance.- Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and undergroundcables.- At least two meters away from lightening(as in a storm) conductor.50cm (1.6 ft)30cm (1 ft)t The grounding wire for the telephone line cannot be used to ground the air conditioner.CAUTION3) Install a green/yellow colored grounding wire :- Refer to the ‘Wiring work’ for the specification of grounding wire.- When the grounding wire is too short, extend the grounding wire but bind the connection part with insulation tape.(Do not bury the connection).- Secure the grounding wire in position with staples.t When the grounding rod is installed in a place where many people pass by, you must fix it firmly.CAUTION4) Carefully check the installation, by measuring the grounding resistance with a ground resistance tester.- If the resistance is above required level, drive the grounding rod deeper into the ground or increase the number ofgrounding rods.5) Connect the grounding wire to the electrical component box inside of the outdoor unit.