(3) Serial Communication Error Identification Procedure

If the lamps on the main body show the following conditions after the completion of self-diagnostics, a communication error between the indoor unit and outdoor unit might be considered.

In such a case, identify the breakdown section by using the following procedure.

NOTE Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure.

Lamp

 

Timer

Operation

Alarm Code

(3) ···

(2) · ·

(1) ·

(Error Code)

E05 (E01)

 

 

 

E07/P04/P05/P20/P27 (E12)

 

 

 

:Off

:Blinking

:Illuminated

< Before the Operation >

WARNING

CAUTION

For terminal strip short circuit work or inter-unit wiring removal, turn off the power to avoid an electric shock.

Release the terminal strip short circuit after the completion of self-diagnostics.

Do not perform the short-circuit work between any other terminals except for specified ones on the specified terminal strip. If such work is performed between the incorrect terminals, the unit might be broken.

 

 

 

 

 

 

 

 

< Convenient Tool for Short-Circuit Work ( for example ) >

 

 

 

Cable

Alligator Clip

Alligator Clip

 

< Check Items before Troubleshooting Serial Communication Start >

After confirming that the following errors do not exist, start the "Troubleshooting Serial Communication" in "Alarm Code : E05 and E07/P04/P05/P20/P27".

1.

Mis -wiring (inter-unit cable, etc.)

6.

Reactor failure (defective insulation, etc.)

2.

AC power failure

7.

High-Pressure Switch failure

3.

Blown fuse

8.

Overload Relay failure

4.

Power Relay failure

9.

Magnetic Coil failure (defective insulation, short-circuit, etc.)

5.

Outdoor Fan Motor failure (defective insulation, etc.)

10. Compressor failure (defective insulation, etc.)

 

 

 

 

(3-1) Alarm Code : E05

Troubleshooting Serial Communication

Is the voltage of about DC12V

or more given between the terminals

2 and 3 on the outdoor unit terminal strip

(Serial Communication Line) ?

(Fig. 1)

Yes

A

( Continued to the next page A. )

 

 

 

-

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor Unit

 

 

 

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor Unit

 

1

 

2

 

3

 

4

 

5

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

3

 

4

5

6

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

 

1

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

3

 

 

 

 

 

 

 

 

 

V

 

 

 

 

 

 

 

 

 

Indoor Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 2

 

 

 

 

 

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

No of the outdoor unit controller is turned OFF.

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

terminal strip.

(Fig. 2)

3. Turn ON the power.

 

B

( Continued to the next page B. )

45

Page 45
Image 45
Panasonic CU-KE30NKU Serial Communication Error Identification Procedure, Off Blinking Illuminated, Before the Operation

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