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Installation Procedure
Step 12 Checking the earthing
If the power distribution circuit does not have a earthing
or the earthing does not comply with specifications, an
earthing electrode must be installed. The corresponding
accessories are not supplied with the air conditioner.
1 Select an earthing electrode that complies with the
specifications given in the illustration.
2 Connect the flexible hose to the flexible hose port.
• In damp hard soil rather than loose sandy or
gravel soil that has a higher earthing 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 earthing electrode and its cable.
NOTE
• The earthing wire for the telephone line cannot be
used to ground the air conditioner.
Carbon plastic
To grounding screw
50 cm
30 cm
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 Install a green/yellow coloured earthing wire:
• If the earthing wire is too short, connect an
extension lead in a mechanical way and wrap it
with insulating tape (do not bury the connection).
• Secure the earthing wire in position with staples.
NOTE
• If the earthing electrode is installed in an area with
heavy traffic, its wire must be connected securely.
20
English
5 Carefully check the installation by measuring the
earthing resistance with a earth resistance tester. If
the resistance is above the required level, drive the
electrode deeper into the ground or increase the
number of earthing electrodes.
6 Connect the earthing wire to the electrical component
box inside of the outdoor unit.
Step 13 Performing final check and
trial operation
1 Check the power supply between the outdoor unit
and the auxiliary circuit breaker.
• 1 phase power supply: L, N
2 Check the indoor unit.
a 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.)
b Check that the thermistor sensor, drain pump/
Steel core
hose, and display are connected correctly.
Terminal M4
PVC-insulated
3 Press K1 or K2 on the outdoor unit PCB to run the
green/yellow
test mode and stop.
wireTo
• Press K1 button → Start Heating test mode →
Press K1 button → Stop → Heating test mode
7-seg display:
• Press K2 button → Start Cooling test mode →
Press K2 button → Stop → Cooling test mode
7-seg display:
• Press K1 button twice → Start Defrost test mode
→ Press K1 button → Stop → Defrost test mode
7-seg display:
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