Panasonic CU-3KS19NBU Service Manual download pdf (Page 112)

Regulations on wire size differ from locality to locality. For

field wiring requirements, please refer to your local electri-

cal codes. Make sure that the installation fully complies

with all local and national regulations.

(1) Remove access panel “C”. (Fig. 32)

(2) Connect the inter-unit and power supply line accord-

ing to the drawing on the panel side.

(3) Be sure to size each wire allowing approx. 4"

(10 cm) longer than the required length for wiring.

Store excess wiring inside the cabinet.

(4) When connections are completed, check that all con-

nections are correct as shown in the wiring system

diagram on panel side.

(5) Be sure to ground the unit according to your local

codes.

Fig. 32

Lock nut

Conduit

plate

Plug

Inter unit

(Conduit)

Power supply

(Conduit)

Cabinet

Terminal

block

Access panel “C”

Fig. 33

Conduit plate

Make sure there is no gap between

access panel “C” and the conduit plate.

Access panel C

CAUTION

6. Test Run

Performing a test run

 Refer to the test run procedures in the indoor unit

installation manual.

 Perform the test run separately for each connected

indoor unit. If 2 units are operated simultaneously, it is

not possible to correctly check for errors in tubing and

wiring.

Checking tubing and wiring

Perform the test run and check that operation is normal. If

there is an error in tubing or wiring, the refrigerant may

flow to indoor unit B when indoor unit A is operated (for

example).

 Stop operation immediately if there is an error in tubing

or wiring. Turn the power (breaker) to OFF, and check

whether the inter-unit cables are connected incorrectly,

or whether the narrow tubes A and B are connected in

reverse. Correct the connections.

 If there is an error in tubing, pump-down must be per-

formed. Be sure to perform pump-down. After making

corrections, again purge the air from the tubes.

CAUTION

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Panasonic CU-3KS19NBU Service Manual Page 112

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