Vacuum pumping
1. Remove the valve caps on
the liquid valve and gas
valve and the nut of refri-
gerant charging vent.
2. Connect the charging ho-
se of piezometer to the
refrigerant charging vent
of gas valve and then co-
nnect the other charging
hose to the vacuum pump.
3. Open the piezometer com-
pletely and operate for
10-15min to check if the
pressure of piezometer re-
mains in -0.1MPa.
4. Close the vacuum pump
and maintain this status for
1-2min to check if the pres-
sure of piezometer remains
in -0.1MPa. If the pressure decreases, there may be leakage.
5. Remove the piezometer, open the valve core of liquid valve and gas valve
completely with inner hexagon spanner.
6. Tighten the screw caps of valves and refrigerant charging vent.
7. Reinstall the handle.
Use vacuum pump
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
charging vent
Vacuum pump
Piezometer
Valve cap
Lo
Hi
Inner hexagon
spanner
Open
Close
1. With leakage detector:
Check if there is leakage with leakage detector.
2. With soap water:
If leakage detector is not available, please use soap water for leakage detection.
Apply soap water at the suspected position and keep the soap water for more
than 3min. If there are air bubbles coming out of this position, there's a leakage.
Leakage detection
17
It may cause insufficient cooling
(heating) capacity.
It may cause insufficient cooling
(heating) capacity.
It may cause insufficient cooling
(heating) capacity.
1. Preparation of test operation
●
The client approves the air conditioner.
●
Specify the important notes for air conditioner to the client.
2. Method of test operation
●
Put through the power, press ON/OFF button on the remote controller to start
operation.
●
Press MODE button to select AUTO, COOL, DRY, FAN and HEAT to check
whether the operation is normal or not.
●
If the ambient temperature is lower than 16°C, the air conditioner can’t
start cooling.
Is the inlet and outlet of piping hole
been covered?
It may cause insufficient cooling (heat-
ing) capacity or a waste of eletricity.
Check after installation
Test operation
Items to be checked
Possible malfunction
The unit may drop, shake or emit noise.
●
Check according to the following requirement after finishing installation.
Have you done the refrigerant leakage
Has the unit been installed firmly?
test?
It may cause condensation and water
dripping.
Is water drained well?
Is heat insulation of pipeline sufficient?
It may cause condensation and water
dripping.
Is the voltage of power supply consis-
tent with to the voltage marked on the
nameplate?
It may cause malfunction or damaging
the parts.
Is electric wiring and pipeline installed
correctly?
It may cause malfunction or damaging
the parts.
Is the unit grounded securely?
It may cause electric leakage.
Does the power cord follow the speci-
fication?
It may cause malfunction or damaging
the parts.
Is there any obstruction in the air inlet
and outlet?
Are the dust and sundries caused during
installation removed?
It may cause malfunction or damaging
the parts.
Are the gas valve and liquid valve of
connection pipe opend completely?
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