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② If the water drain is smooth.
③ If the wiring and piping are correctly installed.
④ Check that no foreign matter or tools are left inside the unit.
★ Leak test of the refrigerant
Depending on the installation method, the following methods may be used to check
for suspect leak, on areas such as the four connections of the outdoor unit and the
cores of the cut-off valves and t-valves:
① Bubble method: Apply of spray a uniform layer of soap water over the suspected
leak spot and observe carefully for bubble.
② Instrument method: Checking for leak by pointing the probe of the leak detector
according to the instruction to the suspect points of leak.
2. Test operation
★ Test preparation
※Verify that all piping and connection cables are well connected.
※Confirm that the values at the gas side the liquid-side are fully open.
※Connect the power cord to an independent power socket.
※Install batteries in remote control.
★ Test Operation method
① Turn on the power and push the ON/OFF switch button of the remote controller to
start the air conditioner.
② Select COOL, HEAT (not available on cool-only models), SWING and other
operation modes with the remote controller and see if the operation is ok.
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