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Test and operation
6. Tighten the screw caps of valves and refriger-
ant charging vent.
Leak detection
Use vacuum pump
Remove the valve caps on the liquid valve and
1.
1.
2.
Reinstall the handle.7.
of liquid valve and gas valve completely with
inner hexagon spanner.
gauges
valve cap
Lo Hi
liquid valve
gas valve
refrigerant charging
vent
nut of refrigerant
charging vent
close
open
vacuum pump
inner hexagon
spanner
for 10-15 min to check if the pressure gauge
remains in -15 psi.
4. Close the vacuum pump and maintain this sta-
tus for 1-2min to check if the pressure of
gauge remains in -15 psi. If the pressure de-
creases, there may be a leak.
5. Remove thegauges, open the valve core
10
3.
Open the gauges completely and operate
refrigerant charging vent of gas valve and then
connect the other charging hose to the vacuum
pump.
With a leak detector:
Check if there is a leak.
With soap water:
If leak detector is not available, please use
soapy water for leak 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
leak.
gas valve and the nut of refrigerant charging vent.
2.
Connect the charging hose of gauges to the
Check after installation
Test operation
●
1.
●
●
Check according to the following requirement
after finishing installation.
Preparation of test operation
The client approves the air conditioner.
Specify the important notes for air conditioner to
the client.
Items to be checked Possible malfunction
The unit may drop, shake or
emit noise.
Has the unit been
installed firmly?
Is water drained well?
It may cause condensation
and water dripping.
Have you done the refri-
gerant leak test?
It may cause insufficient
cooling(heating) capacity.
It may cause malfunction or
damage the parts.
Is electric wiring and pip-
eline installed correctly?
It may cause malfunction or
damage the parts.
Is the unit grounded
securely?
Does the power cord fol-
low the specification?
It may cause malfunction or
damage the parts.
Is there any obstruction in
the air inlet and outlet?
Is heat insulation of pipe-
line sufficient?
It may cause malfunction or
damage the parts.
The gas valve and liquid
valve of connection pipe
are open completely?
The dust and sundries
caused during installation
are removed?
It may cause condensation
and water dripping.
It may cause electric leakage.
Is the inlet and outlet of
piping hole been covered?
Is the voltage of power
supply according to the
voltage marked on the
nameplate?
It may cause insufficient
cooling(heating) capacity.
It may cause insufficient
cooling (heating) capacity.
It may cause insufficient
cooling (heating) capacity
or waste electricity.
●
●
2.
●
Method of test operation
no nottub FFO/NO sserp ,rewop eht hguorht tuP
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(61°F),
the
air conditioner can’t start cooling.
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