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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.
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 3 minutes have elapsed
since the last stop.)
3 After 2 minutes of operation, shut the suction valve
with the same wrench.
RC_DB68-06033A-01.indd 47
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 Turn on th air conditioner and select Fast Cool mode.
2 Let the compressor run for more than 5 minutes.
If the compressor does not operate for more than
5 minutes due to protection control, wait about 2
minutes, and then carry out the next procedure.
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.
1
Liquid service port
<High pressure>
2
Off
1 minute
Gas service port
<Low pressure>
47
English
5/27/2016 5:16:37 PM
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