[L20 error]

[L20 error]

 

Are wiring connections

NO

 

to communication lines

 

 

 

U3 and U4 normal?

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

YES

 

Is not the multiple same central

 

 

 

control system addresses connected?

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

Check central controller

 

 

 

(including network adapter) and

 

 

 

indoor P.C. board (MCC-1403).

 

 

 

Defect Replace

 

 

 

 

 

 

 

 

 

 

 

 

[L30 error]

 

Are outside devices of

NO

 

 

 

connector CN80 connected?

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

NO

 

Do outside devices normally work?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

Check cause of operation.

 

 

 

 

 

 

 

 

 

 

 

 

Correct wiring connection.

Correct central control system address.

Check indoor P.C. board (MCC-1403).

Defect Replace

Check outside devices.

Defect Replace

[P30 error] (Central controller)

Is group operation carried out?

YES

Is there check code

on sub remote controller in main

and sub remote controllers?

YES

Check corresponding

indoor unit/outdoor unit.

NO

NO

Check indoor P.C. board (MCC-1403).

Defect Replace

– 76 –

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Toshiba RAV-SM1603DT-A, RAV-SM1603ATZG-E, RAV-SM1603ATZ-E L20 error, L30 error, P30 error Central controller, 76