Infinity / Evolution inverter AC
ABCD
Four-wire communicating inverter air conditioner. Capacity is serial. No contactor, no dual cap, no reversing valve, no defrost.
Written circuit description only — FieldBench does not redraw maker schematics. Example: R to W closes on a heat call; verify 24V at W1 before you change the IFC.
Open manufacturer PDFABCD only
Infinity or Evolution wall control plus a matching indoor.
Infinity / Evolution wall control
Four-wire ABCD. D is 24V hot, not Y.
- ADataData
- BDataData
- C24V common24V
- D24V hot — not a cool call24V
Infinity / Evolution indoor
Same ABCD. Indoor CFM is serial. A Comfort 59SC5 does not belong here.
- ADataData
- BDataData
- C24V common24V
- D24V hot24V
Outdoor communicating drive
ABCD (or the outdoor comm harness). No Y contactor. No dual cap.
- ADataData
- BDataData
- C24V common24V
- D24V hot — still not Y24V
Outdoor line — inverter drive
208/230 into the drive. No contactor slam. DC bus can stay live after the disconnect.
- L1Line to the driveLine
- L2Line to the driveLine
- GNDEquipment groundLine
Landing
- DataStat A/Bindoor A/Boutdoor A/B
Data pair. Not 24 VAC Y.
- 24VStat Cindoor Coutdoor C
24V common. Still required.
- 24VStat Dindoor Doutdoor D
24V hot. D is not Y.
- LineL1 / L2drive
208/230. No contactor.
Prove it
- Wall-control event list first. Bus fault vs drive fault — do not gauge up on a comm code.
- ABCD landing and polarity. C is still required at the wall control.
Do not
- Do not land conventional Y on D and walk away.
- Do not ohm a defrost sensor or an RV solenoid. That is 25VNA4 / 280ANV.
- Do not change a dual run cap that is not in this cabinet.
Carrier 24VNA6 / 26VNA1 and Bryant 191VAN / 180B. 187B is Evolution two-stage on the same ABCD bus, not this inverter.