Panasonic CU-KS18NKU, CS-KS18NKU service manual Continued from the previous page A

( Continued from the previous page A. )

( Continued from the previous page B. )

A

B

Yes

Is the voltage of about DC22V to

24V given between the terminals

2 and 3 on the indoor unit terminal strip

(Serial Communication Line) ?

(Fig. 2)

No

Defect or connection error

Defect in the indoor unit

in the inter-unit cable

P.C. board

Outdoor Unit

1. Turn OFF the power and wait until the power lamp (LED)

of the outdoor unit controller is turned OFF.

1

2

3

4

5

6

2. Short-circuit between the terminals 2 and 3 on the outdoor

unit terminal strip.

(Fig. 3)

Power

1.Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit.

2.Perform the self-diagnosis five seconds after the operation start.

What is the latest self-diagnosis result ?

Condition: E01

Condition: E12

1 2 3

Indoor Unit

Fig. 3

Defect in the outdoor unit

P.C. board.

1.Turn off the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF.

2.Remove the short-circuit between the terminals 2 and 3 on the outdoor unit terminal strip.

3.Disconnect the cable from the terminal 3 on the indoor unit

terminal strip.(Fig. 4)

Short-circuit between the terminals 2 and 3 on the indoor unit

terminal board. (Fig. 5)

				Outdoor Unit							Outdoor Unit
1	2	3		4	5	6	1	2	3		4	5	6
					Power							Power
1	2	3
Indoor Unit							1	2	3
							Indoor Unit
			Fig. 4							Fig. 5

1.Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit.

2.Perform the self-diagnosis five seconds after the operation start.

Condition: E12

What is the latest self-diagnosis result ?Defect or connection error in the inter-unit cable

Condition: E01

Defect in the indoor unit

P.C. board

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