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CS-E9GFEW CU-E9GFE CS-E12GFEW CU-E12GFE CS-E18GFEW CU-E18GFE
Pages
94
Size
19.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
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cs-e9gfew-cu-e9gfe-cs-e12gfew-cu-e12gfe-cs-e18gfew.pdf
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Panasonic CS-E9GFEW / CU-E9GFE / CS-E12GFEW / CU-E12GFE / CS-E18GFEW / CU-E18GFE Service Manual ▷ View online

65
11.4. Outdoor Unit
11.4.1.
Selecting the Installation Location
Before choosing the installation site, obtain user approval.
• 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 the 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.
11.4.2.
Installating the Outdoor Unit
• Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
• When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
11.4.3.
Connecting the Refrigerant Piping
1. Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.
2. Make flare after inserting the flare nut (locate at valve) onto the copper pipe.
3. Align center of pipe to valve and then tighten with torque wrench to the specified torque as stated in the table.
Model
Piping size
Rated Length 
(m)
Max. Elevation (m)
Min. Piping 
Length (m)
Max. Piping 
Length (m)
Additional Refrigerant 
(g/m)
Gas
Liquid
E9GF / E12GF
3/8”
1/4”
7.5
5
3
15
20
E18GF
1/2”
1/4”
10
15
3
20
30
Model
Piping size (Torque)
Gas
Liquid
E9GF / E12GF
3/8” [42 N
O
m]
1/4” [18 N
O
m)
E18GF
1/2” [55 N
O
m]
1/4” [18 N
O
m)
66
Flaring the pipe end
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.
11.4.4.
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 with check valve, or vacuum pump and vacuum pump
adaptor.
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 a torque of 18 N
O
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.
CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 
 above take the following measure: 
• If the leak stops when the piping connections are tightened further, continue working from step 
.
• 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. 
67
11.4.5.
Connecting the Cable
(FOR DETAIL REFER TO WIRING DIAGRAM AT 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 4 x 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. Cable connection to the power supply through knife switch (Disconnecting means).
• Connect the approved polychloroprene sheathed power supply cable (3 x 1.5 mm
2
), type designation 245 IEC 57 or heavier
cord to the terminal board, and connect the other end of the cable to knife switch (Disconnecting means).
Note: Knife switch (Disconnecting means) should have minimum 3.5 mm contact gap. Secure the cable onto the control board
with the holder (clamper).
68
12 Disassembly and Assembly Instructions
12.1. Indoor Unit
1. Removal of Suction Grille
Push the knob of Suction Grille (2 places) to the “Open”
position to remove Grille.
2. Removal of Front Grille
Remove screws, 2 at top and 2 at bottom to remove the
Front Grille.
3. Removal of Control Board Casing
a. Remove the ground line of the heat exchanger at right
side (1 screw).
b. Remove the screw of the Control board casing at right
side.
Fig. 1
Fig. 2
Fig. 3
High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding 
with repair work. Failure to heed this caution may result in electric shocks.
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