Panasonic CU-4KS31NBU service manual Disconnect switch may be required by national or local codes

WARNING

Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).

Each wire must be firmly connected.

No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part.

Be sure to connect power wires correctly match- ing up numbers on terminals of the outdoor unit and respective indoor units A – D.

CAUTION

Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit.

Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, secu- rity system, or intercom any closer than 3'4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation.

5-3. Wiring System Diagram

3 indoor units with CU-3KS19NBU

*Disconnectswitch

Field

supply

INDOORUNIT

1

230/208V

OUTDOOR UNIT

Terminal

2

230/208V

(B)

Terminal(9P)

(A)

3

230/208V

1

(C)

2

Grounding

*Disconnect

Field supply

(B)

230/208VACphase-Single60HZ

switch

INDOORUNIT

230/208V

(B)

1

4

UNITCB

supply

Terminal

3

230/208V

(C)

(B)

6

(B)

2

5

230/208V

Grounding

*switchDisconnect

line

7

Field supply

230/208V

UNITINDOOR

Terminal

1

(B)

230/208V

8

UNIT

L1Power

L2

lineGrounding

9

2

(C)

3

230/208V

(B)

(C)

Grounding

1

line

Terminal

(2P)

2

(A)

Fig. 25a

WARNING

To avoid the risk of electric shock, each air conditioner unit must be grounded.

For the installation of a grounding device, please observe local electrical codes.

Grounding is necessary, especially for units using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur.

Place a dedicated ground more than 7' (2 m) away from other grounds and do not have it shared with other electric appliances.

*NOTE

Disconnect switch may be required by national or local codes.

CAUTION

Always comply with national and local code requirements.

4 indoor units with CU-4KS24NBU, CU-4KS31NBU

*Disconnect

switch

Field supply

INDOORUNIT

1

230/208V

OUTDOOR UNIT

Terminal

2

switch

230/208V

Terminal(12P)

(A)

(C)

(B)

3

AUNIT

3

230/208V

1

Grounding line

2

*Disconnect

UNITINDOOR

Field

supply

(B)

Terminal

1

6

BUNIT

(B)

2

230/208V

4

(B)

(C)

3

230/208V

5

230/208V

(B)

60HZ

Grounding

line

*Disconnect

switch

UNITINDOOR

Terminal

(Inter-unit)

Field

supply

CUNIT

supply

230/208VACphase-Single

(B)

1

power line

7

230/208V

(C)

2

230/208V

(C)

8

3

9

230/208V

(B)

Grounding

line

230/208V

10

L1Power

UNITINDOOR

Terminal

*Disconnect

switch

DUNIT

L2

lineGrounding

Terminal (2P)

Field

supply

11

1

(B)

12

2

230/208V

(D)

3

230/208V

1

(C)

Grounding

(B)

2

line

(A)

Fig. 25b

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