Vacuum Pumping And Leak; Check After Installation And Test Operation - Gree GWH09QB-K6DNA1E Service Manual

Service Manual
Fig.24
U-shaped curve
Note:
Drain hose
(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)
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
Fig.28
Installation and Maintenance
Wall
Fig.25
The water outlet
can't be placed
in water
The water
outlet can't be
Fig.27
fluctuant
Piezometer
Valve cap
Vacuum pump
Inner hexagon
spanner
Close
Open
2. Leakage Detection
(1) With leakage detector:
The drain hos
can't raise
Check if there is leakage with leakage detector.
upwards
(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.
1
2
3
4
5
6
7
8
9
10
11
12
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.
Lo Hi
(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.
Items to be checked
Has the unit been The unit may drop, shake or
installed firmly? emit noise.
Have you done the It may cause insufficient cooling
refrigerant leakage test? (heating) capacity.
Is heat insulation of It may cause condensation and
pipeline sufficient? water dripping.
It may cause condensation and
Is water drained well?
water dripping.
Is the voltage of power
supply according to the It may cause malfunction or
voltage marked on the damage the parts.
nameplate?
Is electric wiring and
It may cause malfunction or
pipeline installed
damage the parts.
correctly?
Is the unit grounded
It may cause electric leakage.
securely?
Does the power cord It may cause malfunction or
follow the specification? damage the parts.
Is there any obstruction It may cause insufficient cooling
in air inlet and air outlet? (heating) capacity.
The dust and
sundries caused It may cause malfunction or
during installation are damaging the parts.
removed?
The gas valve and liquid
It may cause insufficient cooling
valve of connection pipe
(heating) capacity.
are open completely?
Is the inlet and outlet It may cause insufficient cooling
of piping hole been (heating) capacity or waster
covered? eletricity.
Possible malfunction
103