Vacuum Pumping And Leak Detection; Check After Installation And Test Operation; Installation Of Anti-Tilting Chain - Gree GVH24AK-K3DNC8A Service Manual

Service Manual

8.8 Vacuum Pumping and Leak Detection

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.
liquid valve
refrigerant
charging vent
valve cap
nut of refrigerant
charging vent
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, there's a leakage.
Leakage detection
point of outdoor unit
Leakage detection
point of indoor unit
Installation and Maintenance
piezometer
Lo Hi
gas valve
valve cap
vacuum pump
inner
hexagonspanner
close
open
8.9 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 16ºC, the
air conditioner can't start cooling.

8.10 Installation of anti-tilting Chain

● In order to prevent tilting due to an accident, please install the
anti-tilting chain.
Installation steps:
1. Remove the screw in the anti-tilting hole at the top cover of
indoor unit (see Figure 1).
2. Take out the anti-tilting chain from the accessories; put it into
the anti-tilting hole and then fix it with screw (see Figure 2).
3. Fix the other end of anti-tilting chain on the wall with
screw(ST4.2X38) (see Figure 2).
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.
37