Samsung AQ24A2RC User manual

SERVICE Manual
CONTENTSAIR CONDITIONER
1. Installation
2. Disassembly and Reassembly
3. Troubleshooting
4. Exploded Views and Parts List
5. Refrigerating Cycle Block Diagrams
6. Wiring Diagrams
7. Schematic Diagrams
ROOM AIR CONDITIONER
INDOOR UNIT
AQ24A2RC
AQ18A6RC
AQ18A0RCD
OUTDOOR UNIT
UQ24A2RC
UQ18A6RC
UQ18A0RCD
E DB81-00188A(4)
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1. Installation
1-1 Refrigerant Refill Procedure
• Refill an air-conditioner with refrigerant when refrigerant has been leaked at installing or using
1. Purge air(for new installation only).
3. Connect the tank to refill with Refrigerant
4. Set the unit to cool operation mode.
7. Stop operation of the air conditioner.
9. Close the cap of each valve.
2. Turn the 3-way valve clockwise to close, connect the
pressure gauge(low pressure side) to the service valve,
and open the 3-way valve again.
5. Check the pressure indicated by the pressure
gauge(low pressure side).
* Standard pressure is should be 4.5~5.5kg/cm2in a
regular, high operation mode.
6. Open the refrigerant tank and fill with refrigerant until
the rated pressure is reached.
* It is recommended not to pour the refrigerant in too
quickly, but gradually while operating a pressure valve.
8. Close the 3-way valve, disconnect the pressure gauge,
and open the 3-way valve again.
R-22
Suspension hook
High
pressure
gauge
Hand
wheel
Finger tight
fittings
Connected to
high pressure
side
Charging
line
For mounting
other and of
hose when
not in use
Compound
gauge
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1-2 “Pump down” Procedure
Relocation of the air conditioner
• Refer to this procedure when the unit is
relocated.
1. Carry out the pump down procedure (refer
to the details of 'pump down').
2. Remove the power cord.
3. Disconnect the assembly cable from the
indoor and outdoor units.
4. Remove the flare nut connecting the
indoor unit and the pipe.
At this time, cover the pipe of the indoor
unit and the other pipe using a cap or
vinyl plug to avoid foreign material enter-
ing.
5. Disconnect the pipe connected to the out-
door unit.
At this time, cover the valve of the out-
door unit and the other pipe using a cap or
vinyl plug to avoid foreign material enter-
ing.
6. Make sure you do not bend the connection
pipes in the middle and store together
with the cables.
7. Move the indoor and outdoor units to a
new locatioon.
8. Remove the mounting plate for the indoor
unit and move it to a new location.
Pump down' shall be carried out when an evaporator is replaced or when the unit is relocated in
another area.
1. Remove the caps from the 2-way valve and the 3-way valve.
3. Set the unit to cool operation mode.
(Check if the compressor is operating.)
5. When the pressure gauge indicates "0" turn the 3-way valve
clockwise to close.
4. Turn the 2-way valve clockwise to close.
6. Stop operation of the air conditioner.
7. Close the cap of each valve.
2. Turn the 3-way valve clockwise to close and connect
a pressure gauge(low pressure side) to the service valve,
and open the 3-way valve again.
2-Way Valve
3-Way Valve
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2. Disassembly and Reassembly
Stop operation of the air conditioner and remove the power cord before repairing the unit.
2-1 Indoor Unit
No Parts Procedure Remark
!Front Grille 1) Stop the air conditioner operation and block
the main power.
2) Seperate tape of front panel upper.
3) Contract the second finger to the left, and right
handle and pull to open the inlet grille.
4) Take the left and right filter out.
5) Loosen one of the right fixing screw and
seperate the terminal cover.
6) Loosen three fixing screws of front grille.
7) Pull the upper left, right and center of discharge
softly for the outside cover to be pulled out.
8) Pull softly the lower part of discharge and push
it up.
Caution;
Assemble the front panel and fix the
hooks of left, right and center.
* Take the Deadorizing and Electrostatic filter
out. (optional)
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No Parts Procedure Remark
Ass’y Tray Drain.
Electrical Parts
(Main PCB)
Heat Exchanger
@
#
$
1) Do “1” above.
Separate the drain hose from the extension
drain hose.
2) Take the display PCB out.
(Center of indoor unit)
3) Loosen two fixing screws of left and right.
4) Pull tray drain out from the back body.
1) Do “1”, “2”, above.
2) Take all the connector of PCB upper side out.
(Inclusion Power cord)
3) Separate the outdoor unit connection wire from
the terminal block.
4) Pulling the Main PCB up. it will be taken out.
(Separate the TRANS hook. it before).
1) Do “1” and “2”, “3”, above.
2) Loosen two fixing earth screws of right side.
3) Separate the connection pipe.
4) Separate the bush body at the upper side and
holder at the rearside.
5) Loosen the two fixing screws of left side.
6) Lifting the heat exchanger up a little to push the
up side for separation from the indoor unit.
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