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Grounding work
If the power distribution circuit does not have a grounding or the grounding does not comply with
specifications, 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 wire
Copper wire
Carbon rod
2) 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 underground
cables .
- At least two meters away from lightening(as in a storm) conductor .
50cm (1 .6 ft)
30cm (1 ft)
• The grounding wire for the telephone line cannot be used to ground the air conditioner .
CAUTION
3) Install a green/yellow coloured 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 .
• When the grounding rod is installed in a place where many people pass by, you must fix it firmly .
CAUTION
4) 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 of
grounding rods .
5) Connect the grounding wire to the electrical component box inside of the outdoor unit .
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