Troubleshooting (Continued)

3. Troubleshooting for Each Check Code

Check code

Check code name

Possible causes

 

 

 

[E01]

I/U - R/C communication error

AImproper R/C wire connection

(New code)

(detected by R/C)

BFailure of I/U power supply

 

 

CFailure of I/U board

 

 

DInvalid R/C address setting

 

 

EFailure of R/C board

 

 

 

Are R/C wires

NO

A/B correct?

 

YES

 

Improper harness

YES

connection from I/U terminal block?

NO

 

Group control

NO

operation?

 

YES

 

Are all indoor

NO

units powered ON?

 

YES

 

Is R/C powered ON?A/B

NO

terminals: Approx. 18VDC

 

YES

 

Is “no header”

YES

set by double R/C?

 

NO

 

Correct R/C wires.

Correct connector connection.

Check circuit wiring.

Check I/U power connection (power off and on).

Check I/U boards.

→Replace defective board.

Correct one header/one follower. (R/C address connector)

Check R/C board.

→Replace it if necessary.

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