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Checking correct grounding
If the power distribution circuit does not have an earth or the ground does
not comply with specifications, an grounding electrode must be installed.
The corresponding accessories are not supplied with the air conditioner.
Select an grounding electrode that complies with the specifications given in
the illustration.
Determine a suitable location for the grounding electrode:
◆
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 metres away from a lightening conductor grounding
electrode and its cable
1
2
Finish wrapping insulating tape around the rest of the pipes leading to the
outdoor unit.
3
Install a green/yellow coloured grounding wire:
◆
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)
◆
Secure the grounding wire in position with staples
4
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.
5
Connect the grounding wire to the electrical component box inside of the
outdoor unit.
6
◆
The grounding wire for the telephone line cannot be used to
ground the air conditioner.
N
N
N
N
o
o
o
o
tt
tt
e
e
e
e
◆
If the grounding electrode is installed in an area of heavy traffic,
its wire must be connected securely.
N
N
N
N
o
o
o
o
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tt
e
e
e
e
50cm
Terminal M4
PVC-insulated green/
yellow wire
To
grounding
screw
Steel
core
Carbon
plastic
30cm
