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Step 4.3 Performing final check and
trial operation
1 Check the following:
• Strength of the installation site
• Tightness of pipe connection to detect gas leak
• Electric wiring connection
• Heat-resistant insulation of the pipe
• Drainage
• Grounding conductor connection
• Correct operation (Take the following steps.)
2 Press the
(Power) button on the remote
control to check the following:
• The indicator on the indoor unit lights up.
• The airflow blade opens and the fan gears up
for operation.
3 Press the
(Mode) button to select Cool or Heat
mode. Then take the following sub-steps:
• In Cool mode, use the Temperature button to
set the set temperature to 16 °C.
• In Heat mode, use the Temperature button to
set the set temperature to 30 °C.
• Check whether, approximately 3 to 5 minutes
later, the outdoor unit starts, and a cool or
warm air blows out.
• After 12 minutes of stationary condition, check
the indoor unit air treatment.
4 Press the
(Air swing) button to check whether
the airflow blades work properly.
5 Press the
(Power) button to stop the trial
operation.
Pumping down refrigerant
Pump-down is an operation intended to collect
all the system refrigerant in the outdoor unit. This
operation must be carried out before disconnecting
the refrigerant tubing in order to avoid refrigerant
loss to the atmosphere.
WARNING
• After installing the product, be sure to perform
leak tests on the piping connections. After
pumping down refrigerant to inspect or relocate
the outdoor unit, be sure to stop the compressor
and then remove the connected pipes.
– Do not operate the compressor while a
valve is open due to refrigerant leakage
from a pipe or an unconnected or incorrectly
connected pipe. Failure to do so may
cause air to flow into the compressor and
too a high pressure to develop inside the
refrigerant circuit, leading to an explosion
or product malfunction.
1 Shut off the liquid valve with the Allen wrench.
2 Turn on the air conditioner in cooling with fan
operating at high velocity. (Compressor will
immediately start, provided 5 minutes have
elapsed since the last stop.)
3 After 1 minutes of operation, shut the suction
valve with the same wrench.
4 Turn off the air conditioner and switch mains
supply off.
5 Disconnect tubing. After disconnection, protect
valves and tubing ends from dust.
CAUTION
• Compressor damage may occur if the compressor
is run at a negative suction pressure.
Pumping down for removing the product
1 Hold down the
(Power) button on the indoor
unit for 5 seconds. Beep sounds immediately to
indicate that the product is ready for pump down
procedure.
2 Let the compressor run for more than 5 minutes.
3 Release the valve caps on High and Low pressure
side.
4 Use L-wrench to close the valve on the high
pressure side.
5 After approximately 1 minute, close the valve on
the low pressure side.
6 Stop operation of the air conditioner by pressing
the
(Power) button on the indoor unit or
remote control.
7 Disconnect the pipes.
English
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