DOWNLOAD Panasonic CS-C7HKD / CS-C9HKD / CS-C12HKD / CU-C7HKD / CU-C9HKD / CU-C12HKD Service Manual ↓ Size: 5.24 MB | Pages: 64 in PDF or view online for FREE

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• 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.

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 (C7HKD,

C9HKD, C12HKD) × 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).

• 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.

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

C7HKD, C9HKD, C12HKD

474

87

18.5

261

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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.

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.

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

C7HKD, C9HKD

3/8” [42 N•m]

1/4” [18 N•m]

C12HKD

1/2” [55 N•m]

1/4” [18 N•m]

Do not over tighten, over tightening cause gas leakage.

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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 (C7HKD,

C9HKD, C12HKD) × 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.

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.

• 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.