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41
English
Installation
Pumping down refrigerant
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.
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 pipe in order to avoid refrigerant loss to the
atmosphere.
1. Turn the system on in cooling with fan operating at high
velocity and then let the compressor run for more than 5
minutes. (Compressor will immediately start, provided 3
minutes have elapsed since the last stop.)
2. Release the valve caps on High and Low pressure side.
3. Use L-wrench to close the valve on the high pressure
side.
4. After approximately 2 minute, close the valve on the low
pressure side.
5. Stop operation of the air conditioner by pressing the
(Power) button on the indoor unit or remote control.
6. Disconnect the pipes.
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.
1
2
Liquid service port
<High pressure>
Gas service port
<Low pressure>
Off
1 minute
A(Liquid)
B(Gas)
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