Carrier RAV-SP180UT-UL Service Manual page 100

[E09 error]
Are 2 headers set by
double wired remote controller?
NO
[E18 error]
Are A/B wires normal?
Improper harness connection
from indoor unit terminal block?
Is indoor unit switch SW02 setting correct?
NO
Group control operation?
Are all indoor units powered ON?
NO
Twin or triple control?
Improper signal connection
between indoor unit and outdoor unit?
YES
YES
NO
Bit 1: OFF
Bit 2: OFF
YES
YES
YES
YES
NO
Correct one header/one follower.
(Wired remote controller address connector)
Check wired remote controller board.
→ Replace it if necessary.
NO
Correct wired remote controller wire connection.
YES
Correct connector connection.
NO
Correct switch setting on MCC-1510 P.C. board.
NO
Check indoor unit power connection
YES
Correct signal wire connection
between indoor unit and outdoor unit.
Check MCC-1510 P.C. board.
→ Replace it if necessary.
– 100 –
Check circuit wiring.
(Power off and on).