Checking correct grounding
If the power distribution circuit does not have a grounding or the grounding does not comply with specifications, an
grounding electrode must be installed . The corresponding accessories are not supplied with the air conditioner .
1 . Select an grounding electrode that complies with the specifications given in
the illustration .
2 . Connect the flexible hose to the flexible hose port .
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In damp hard soil rather than loose sandy or gravel soil that has a higher
grounding resistance .
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Away from underground structures or facilities, such as gas pipes, water
pipes, telephone lines and underground cables .
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At least two metres away from a lightening conductor grounding electrode
and its cable .
• The grounding wire for the telephone line cannot be used to
ground the air conditioner .
NOTE
3 . Finish wrapping insulating tape around the rest of the pipes leading to the
outdoor unit .
Terminal M4
PVC-insulated green/
yellow wire
To grounding
screw
Steel core
Carbon
plastic
1 .6 ft
1 ft
4 . Install a green/yellow coloured grounding wire :
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If the grounding wire is too short, connect an extension lead, in a mechanical way and wrapping it with insulating tape
(do not bury the connection) .
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Secure the grounding wire in position with staples .
• If the grounding electrode is installed in an area of heavy traffic, its wire must be connected securely .
NOTE
5 . Carefully check the installation, by measuring the grounding resistance with a ground resistance tester . If the resistance is
above required level, drive the electrode deeper into the ground or increase the number of grounding electrodes .
6 . Connect the grounding wire to the electrical component box inside of the outdoor unit .
Testing operations
1 . Check the power supply between the outdoor unit and the auxiliary circuit breaker .
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1 phase power supply : L1, L2
2 . Check the indoor unit .
1) Check that you have connected the power and communication cables correctly . (If the power cable and
communication cables one mixed up or connected incorrectly, the PCB will be damaged .)
2) Check the thermistor sensor, drain pump/hose, and display are connected correctly .
3) KEY buttons are on Main PBA of Outdoor Unit .
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