Service manual

4. Please test the drainage system after completing the installation works. During test, check if
the water flows through the pipe correctly. Check the connecting point with care to ensure
there is no leakage. If the unit is installed in a new house, it is recommended to test before
starting decoration of the ceiling.
11.7 Test Run and Checks after Installation
11.7.1 Test Run
1) Preparations for Test Run
a) Do not connect to the power supply unless all installation works has been completed.
b) The control circuit is correctly connected and all cables are fixed securely.
c) The valve of gas pipe and liquid pipe shall be open.
d) All scattered articles, especially the metal scraps and threads, shall be removed from the unit.
2) Method of Test Run
a) Switch on the power and press the ON/OFF button on the remote controller to start the test run.
b) Press MODE button and select COOL, HEAT and FAN mode to check if the run is normal.
c) Emergency run.
11.7.2 Checks after Installation See Table 11-4
Table 11-4
Items to be Checked Possible Result in Case of Improper Installation
If the installation is secure? The unit may fall, vibrate or give out noise
If the leakage detection is done?
Possibly causing low cooling capacity (heating
capacity).
If the unit is heat insulated satisfactorily? Possible dew or drips of water
If the water drainage is smooth? Possible dew or drips of water
If the power voltage is identical to the ratings on
nameplate?
The machine may be incurred to failure or the parts
may be burnt
If the cables and pipes are connected correctly?
The machine may be incurred to failure or the parts
may be burnt
If the unit is safely earthed? Risk of electric leakage
If the cable type conforms to the specification?
The machine may be incurred to failure or the parts
may be burnt
If there is obstacles at the air inlet and outlet of indoor and
outdoor unit?
Possibly
causing low cooling capacity (heating
capacity).
If the refrigerant pipe length and refrigerant fill are
recorded?
Unable to control the quantity of refrigerant filled
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