Carrier 42TGV0131CP Service Manual

9-2-4. Diagnostic Procedure for Each Check Code (Indoor Unit)Check code[E01 error]Is inter-unit cable of A and B normal?Is group control operation?Is power of all indoor units turned on?Is power supplied to remote controller?AB terminal: Approx. DC18VAre 2 remote controllers setwithout header unit?Are 2 master units set in2 remote controllers?Is there no disconnection orcontact error of connector on harnessfrom terminal block of indoor unit?Check power connection of indoor unit.(Turn on power again.)Check indoor P.C. board (MCC-1643).Defect → ReplaceCheck remote controller P.C. board.Defect → ReplaceCorrect as a header unitand a follower unit.Check remote controller P.C. board.Defect → ReplaceCorrect a header unit/a follower unit.(Remote controller address connector)Correct connection of connector.Check circuit wiring.Correct inter-unit cableof remote controllerYESYESYESYESYESYESYESNONONONONONONO[E09 error]FILE NO. SVM-19024- 55 -