SUPER DIGITAL

[L20 error]
Are wiring connections
to communication lines
U3 and U4 normal?
YES
NO
Correct wiring connection.
Is not the multiple same central
control system addresses connected?
NO
YES
Correct central control system address.
Check central controller
(including network adapter) and
indoor P.C. board (MCC-1570).
Defect → Replace
[L30 error]
Are outside devices of
connector CN80 connected?
YES
Do outside devices normally work?
YES
NO
NO
Check indoor P.C. board (MCC-1570).
Defect → Replace
Check outside devices.
Defect → Replace
Check cause of operation.
[P30 error] (Central controller)
Is group operation carried out?
YES
NO
Is there check code
on sub remote controller in main
and sub remote controllers?
YES
NO
Check corresponding
indoor unit/outdoor unit.
Check indoor P.C. board (MCC-1570).
Defect → Replace
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