Panasonic Cs A7gkd Cs A9gkd Cs A12gkd Series Repair Manual

							21 BOTTOM VIEW 
						

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10.2. Indoor Unit (Power Printed Circuit Board)
TOP VIEW
BOTTOM VIEW 
						

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10.3. Indicator
TOP VIEW
BOTTOM VIEW 
						

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11 Installation Instruction
11.1. Select The Best Location
• There should not be any heat source or steam near the unit.
• There should not be any obstacles blocking the air
circulation.
• A place where air circulation in the room is good.
• A place where drainage can be easily done.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling,
fence or other obstacles.
• Recommended installation height for indoor unit shall be at
least 2.5 m.
• If an awning is built over the unit to prevent direct sunlight or
rain, be careful that heat radiation from the condenser is not
obstructed.
• There should not be any animal or plant which could be
affected by hot air discharged.
• Keep the spaces indicated by arrows from wall, ceiling,
fence or other obstacles.
• Do not place any obstacles which may cause a short circuit
of the discharged air.
• If piping length is over the rated length, additional refrigerant
should be added as shown in the table.
• This illustration is for explanation purposes only.
The indoor unit will actually face a different way.
Indoor Unit
Outdoor Unit
Piping size Rated
Length
(m)Max
Elevation
(m)Max.
Piping
Length
(m)Additional
Refrigerant
(g/m) Model Gas Liquid
C7GK/
C9GK3/8” 1/4” 7.5 5 10 10
A7GK/
A9GK3/8” 1/4” 7.5 5 10 20
C12GK 1/2” 1/4” 7.5 5 15 10
A12GK 1/2” 1/4” 7.5 5 15 20Indoor/Outdoor Unit Installation Diagram 
						

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11.2. Indoor Unit
11.2.1. How To Fix Installation Plate
The mounting wall is strong and solid enough to prevent it from
the vibration.
The centre of installation plate should be at more than 450 mm
at right and left of the wall.
The distance from installation plate edge to ceiling should more
than 67 mm.
From installation plate left edge to units left side is 74 mm.
From installation plate right edge to units right is 94 mm.
1. Mount the installation plate on the wall with 5 screws or
more.
(If mounting the unit on the concrete wall, consider using
anchor bolts.)
• Always mount the installation plate horizontally by
aligning the marking-off line with the thread and using a
level gauge.
2. Drill the piping plate hole with ø70 mm hole-core drill.
• Line according to the left and right side edge of the instal-
lation plate. The meeting point of the extended line is the
centre of the hole. Another method is by putting measur-
ing tape at position as shown in the diagram above. The
hole centre is obtained by measuring the
distance namely 150 mm and 125 mm for left and right
hole respectively.
• Drill the piping hole at either the right or the left and the
hole should be slightly slanted to the outdoor side.
11.2.2. To Drill A Hole In The Wall And
Install A Sleeve Of Piping
1. Insert the piping sleeve to the hole.
2. Fix the bushing to the sleeve.
3. Cut the sleeve until it extrudes about 15 mm from the
wall.
4. Finish by sealing the sleeve with putty or caulking
compound at the final stage.
11.2.3. Indoor Unit Installation
For the right rear piping
For the right and right bottom piping
:
:
:For left side piping, piping connection for liquid should be
about 15 mm from this line.
For left side piping, piping connection for gas should be
about 45 mm from this line.
For left side piping, piping connection cable should be
about 800 mm from this line.
Caution
When the wall is hollow, please be sure to use the sleeve for tube
ass’y to prevent dangers caused by mice biting the connecting cable. 
						

							26 For the embedded piping
Pull out the piping and drain hose
How to keep the coverInsert the connecting cable
Install the Indoor unit
Secure the Indoor Unit
(This can be used for left rear piping & left bottom piping 
also.) 
						

							27 • How to pull the piping and drain hose out, in case of the
embedded piping.
• In case of left piping how to insert the connecting cable and
drain hose.
11.2.4. Connect The Cable To The Indoor
Unit
1. The inside and outside connecting cable can be
connected without removing the front grille.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 3 (C7GK,
C9GK, C12GK) or 5 (A7GK, A9GK, A12GK) × 1.5mm
2
flexible cord, type designation 245 IEC 57 or heavier
cord.
• Ensure the colour of wires of outdoor unit and the
terminal Nos. are the same to the indoor’s respectively.
• Earth lead wire shall be longer than the other lead wires
as shown in the figure for the electrical safety in case of
the slipping out of the cord from the anchorage.• Secure the cable onto the control board with the holder
(clamper).
11.3. Outdoor Unit
11.3.1. Install The Outdoor Unit
• After selecting the best location, start installation according
to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly and
horizontally by bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and
earthquake. Please fasten the installation stand firmly
with bolt or nails.
11.3.2. Connecting The Piping
Connecting The Piping To Indoor Unit
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe. (In case of using long
piping)
Connect the piping
• Align the center of piping and sufficiently tighten the flare nut
with fingers.
• Further tighten the flare nut with torque wrench in specified
torque as stated in the table.
Model A B C D
C7GK, C9GK, A7GK,
A9GK474 87 18.5 261
A12GK, C12GK 570 105 18.5 320 
						

							28 Connecting The Piping To Outdoor Unit
Decide piping length and then cut by using pipe cutter. Remove
burrs from cut edge. Make flare after inserting the flare nut
(locate at valve) onto the copper pipe. Align center of piping to
valves and then tighten with torque wrench to the specified
torque as stated in the table.CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not
removed, gas leakage may be caused. Turn the piping
end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the
copper pipes.
11.3.3. Evacuation Of The Equipment
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.
1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.
• Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to -
76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not
move after approximately five minutes.
Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at torque of 18 N.m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
• Be sure to check for gas leakage.
Model Piping size (Torque)
Gas Liquid
C7GK, C9GK, A7GK, A9GK 3/8” [42 N•m] 1/4” [18 N•m]
C12GK, A12GK 1/2” [55 N•m] 1/4” [18 N•m] 
						

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11.3.4. Connect The Cable To The Outdoor
Unit
1. Remove the control board cover from the unit by
loosening the screw.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 3 (C7GK,
C9GK, C12GK) or 5 (A7GK, A9GK, A12GK) × 1.5 mm
2
flexible cord, type designation 245 IEC 57 or heavier
cord.
3. Secure the cable onto the control board with the holder
(clamper).
4. Attach the control board cover back to the original
position with the screw.
11.3.5. Pipe Insulation
1. Please carry out insulation at pipe connection portion as
mentioned in Indoor/Outdoor Unit Installation Diagram.
Please wrap the insulated piping end to prevent water
from going inside the piping.
2. If drain hose or connecting piping is in the room (where
dew may form), please increase the insulation by using
POLY-E FOAM with thickness 6mm or above. CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure: 
• If the leak stops when the piping connections are tightened further, continue working from step 3.
• If the leak does not stop when the connections are retightened, repair the location of leak.
• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.  
						

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12 Operation and Control
12.1. Heating Operation
• Heating operation can be set using remote control.
• This operation is applied to warm the room temperature reaches the setting temperature set on the remote control.
• The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to
30°C.
• During heating operation, the compressor will stop running and restart as shown in below figure.
12.1.1. Heating Operation Time Diagram