Vacuum Pumping And Leak Detection; Check After Installation And Test Operation - Gree GWH09ACC-S6DBA1A Service Manual

Note:
(1) The through-wall height of drain hose shouldnt be higher
than the outlet pipe hole of indoor unit.(As show in Fig.25)
(2) Slant the drain hose slightly downwards. The drain hose
cant be curved, raised and fluctuant, etc.(As show in Fig.26)
(3) The water outlet cant be placed in water in order to drain
smoothly.(As show in Fig.27)
The drain hose can't be fluctuant
The drain hose
can't be fluctuant
Fig.26

8.7 Vacuum Pumping and Leak Detection

1. Use Vacuum Pump
(1) Remove the valve caps on the liquid valve and gas valve
and the nut of refrigerant charging vent.
(2) Connect the charging hose of piezometer to the refrigerant
charging vent of gas valve and then connect the other charging
hose to the vacuum pump.
(3) Open the piezometer completely and operate for 10-15min
to check if the pressure of piezometer remains in -0.1MPa.
(4) Close the vacuum pump and maintain this status for 1-2min
to check if the pressure 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.(As show in Fig.28)
(7) Reinstall the handle.
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
Fig.28
42
The water outlet
can't be placed
The water
in water
outlet can't be
Fig.27
fluctuant
Piezometer
Lo Hi
Valve cap
Vacuum pump
Inner hexagon
spanner
Close
Open
2. Leakage Detection
(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, theres a leakage.
8.8 Check after Installation and Test
Operation
1. Check after Installation
Check according to the following requirement after finishing
installation.
NO. Items to be checked
Has the unit been
1
installed firmly?
Have you done the
2
refrigerant leakage test?
Is heat insulation of
3
pipeline sufficient?
4 Is water drained well?
Is the voltage of power
supply according to the
5
voltage marked on the
nameplate?
Is electric wiring and
6 pipeline installed
correctly?
Is the unit grounded
7
securely?
Does the power cord
8
follow the specification?
Is there any obstruction
9
in air inlet and air outlet?
The dust and
sundries caused
10
during installation are
removed?
The gas valve and liquid
11 valve of connection pipe
are open completely?
Is the inlet and outlet
12 of piping hole been
covered?
2. Test Operation
(1) Preparation of test operation
● The client approves the air conditioner installation.
● 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℃ , the air
conditioner cant start cooling.
Service Manual
Possible malfunction
The unit may drop, shake or
emit noise.
It may cause insufficient cooling
(heating) capacity.
It may cause condensation and
water dripping.
It may cause condensation and
water dripping.
It may cause malfunction or
damage the parts.
It may cause malfunction or
damage the parts.
It may cause electric leakage.
It may cause malfunction or
damage the parts.
It may cause insufficient cooling
(heating) capacity.
It may cause malfunction or
damaging the parts.
It may cause insufficient cooling
(heating) capacity.
It may cause insufficient cooling
(heating) capacity or waster
eletricity.
Installation and Maintenance