Performing final check and trial operation

Step 4.3 Performing final check and trial operation

1Check 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.)

2Press 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.

3Press 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 air blows out.

•After12 minutes of stationary condition, check the indoor unit air treatment.

4Press the (Air swing) button to check whether the airflow blades work properly.

5Press the (Power) button to stop the trial operation.

Pumping down for removing the product

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.

1Hold 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.

2Let the compressor run for more than 5 minutes.

3Release the valve caps on High and Low pressure side.

4Use L-wrench to close the valve on the high pressure side.

5After approximately1 minute, close the valve on the low pressure side.

6Stop operation of the air conditioner by pressing the (Power) button on the indoor unit or remote control.

7Disconnect the pipes.

CAUTION

•Compressor damage may occur if the compressor is run at a negative suction pressure.

	1
	1 minute
Liquid service port	Gas service port
<High pressure>	<Low pressure>

Off

English 23

Installation

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