FieldBench
Models
Bryantac

191VAN

Evolution inverter AC

Bryant Evolution inverter air conditioner (191VAN current; 180B in the field). Outdoor drive + ABCD. No reversing valve and no defrost — that is 280ANV. Charge is weigh-in.

Not 280ANV (Evolution HP — RV + defrost). Not 187B (Evolution two-stage scroll, not an inverter). Not 148TAN / 146SAN (Preferred Y1/Y2 or one Y). Not 26-series Carrier R-454B unless the plate says Puron Advance.

Diagnose this modelInstall notesBoard cross-refField wiring

Drive

Inverter scroll · variable capacity · typically R-410A on 180B / 191VAN

Bus

Evolution ABCD

Charge

Weigh-in + line-set. Not a 135SAN piston SH chart.

Sister

Carrier 24VNA6 / 24VNA9

This board

Outdoor inverter + Evolution UI — AC only

  • Evolution events first. Outdoor drive L-codes.
  • There is no defrost sensor to ohm. If you want one, you are on 280ANV.
  • No contactor slam. If you hear one, you are on 148TAN / 146SAN / 135SAN.

Evolution last 10. Outdoor last-fault if the stat is blank.

Universal swap

No universal

Bryant 191VAN outdoor. No furnace IFC universal. Replace the OEM outdoor control / contactor / drive by the silk.

Silk: 191VAN

White-Rodgers

—

ICM

—

Honeywell

—
  • Indoor furnace universals (50A55, 50M56U, ICM282B, ICM2811, S9200U). This is not an IFC.
  • Do not ‘adapt’ a furnace board to an outdoor inverter, defrost PCB, or contactor.

After you pull the dead card

  1. 1Photograph the outdoor silk. Indoor 50A55 / ICM282B / S9200U do not belong here.
  2. 2Contactor units: replace the contactor / cap / HPS — there is no universal outdoor board.
  3. 3Inverter / communicating outdoors: OEM drive only. There is no White-Rodgers or ICM outdoor universal.

Field wiring

Written landings for Bryant 191VAN. Not a factory schematic.

Infinity / Evolution inverter AC
ABCDR-410A

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 PDF

This indoor

Evolution 987M / 986T / matching fan coil. 926T is the wrong bus on most jobs.

ABCD 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.

Sequence

  1. 1

    Call

    Wall control requests capacity over ABCD. Inverter ramps. No Y contactor.

  2. 2

    Protect

    HPS / LPS / drive OC. This outdoor never defrosts.

Faults on this IFC

Step 1, then 2, then 3. Expected reading and the fail branch sit under each check.

Comm

ABCD / outdoor drop

lockout

Drive or bus. Wall control loses the outdoor.

  1. 1 Let it cool, then read the drive LED

    On Bryant 191VAN overcurrent / overheat is often a dirty coil, a failed OD fan, or a locked compressor — not a dead inverter. Clear airflow, confirm the OD fan, and read the drive LED before you order a control. ABCD landing and polarity, outdoor board power, inverter comms harness.

    Expect: OD fan running. Coil clean. Drive LED decoded from THIS outdoor’s card.

  2. 2 Voltage and compressor windings

    Incoming voltage in range (this plate’s line-voltage code). Compressor windings even, no ground. A shorted compressor will kill a new drive. C still required at the wall control.

    Expect: Balanced windings. No winding to ground. Line voltage stable under load.

  3. 3 Charge and the drive last

    A starved or flooded compressor will overcurrent. Confirm SH/SC and charge weight. Only then condemn the inverter. Indoor must be Infinity-capable. A 24ACC6-style indoor pairing is the wrong mental model.

    Expect: Charge on the nameplate. Drive code gone after a cool-down and a clean coil.

HPS / LPS

Pressure protection

lockout

Still real on an inverter.

  1. 1 Let it cool, then read the drive LED

    On Bryant 191VAN overcurrent / overheat is often a dirty coil, a failed OD fan, or a locked compressor — not a dead inverter. Clear airflow, confirm the OD fan, and read the drive LED before you order a control. Coil, fan, charge by weigh-in — you do not ‘top off’ a Greenspeed.

    Expect: OD fan running. Coil clean. Drive LED decoded from THIS outdoor’s card.

  2. 2 Voltage and compressor windings

    Incoming voltage in range (this plate’s line-voltage code). Compressor windings even, no ground. A shorted compressor will kill a new drive. Outdoor fan that is actually the inverter-driven fan, not a dual-cap PSC motor.

    Expect: Balanced windings. No winding to ground. Line voltage stable under load.

  3. 3 Charge and the drive last

    A starved or flooded compressor will overcurrent. Confirm SH/SC and charge weight. Only then condemn the inverter. Do not use 24ACC6 piston superheat as the pass/fail.

    Expect: Charge on the nameplate. Drive code gone after a cool-down and a clean coil.

Inverter

Drive overcurrent / overheat

lockout

L5/L4-class faults on the drive.

  1. 1 Let it cool, then read the drive LED

    On Bryant 191VAN overcurrent / overheat is often a dirty coil, a failed OD fan, or a locked compressor — not a dead inverter. Clear airflow, confirm the OD fan, and read the drive LED before you order a control. Compressor to ground, heat sink, supply voltage. Weigh-in vs nameplate.

    Expect: OD fan running. Coil clean. Drive LED decoded from THIS outdoor’s card.

  2. 2 Voltage and compressor windings

    Incoming voltage in range (this plate’s line-voltage code). Compressor windings even, no ground. A shorted compressor will kill a new drive. These L-codes do not exist on 24ACC6. If you are looking at a contactor, you are on the wrong outdoor.

    Expect: Balanced windings. No winding to ground. Line voltage stable under load.

  3. 3 Charge and the drive last

    A starved or flooded compressor will overcurrent. Confirm SH/SC and charge weight. Only then condemn the inverter.

    Expect: Charge on the nameplate. Drive code gone after a cool-down and a clean coil.

Workflows

Silent 191VAN / 180B

Evolution calling cool, outdoor not ramping.

  1. 1 Prove the call and the live code

    Stat event list. Bus vs drive.

    Expect: Write whatever Outdoor inverter + Evolution UI — AC only is showing. Evolution last 10. Outdoor last-fault if the stat is blank.

    If fail: No call at the IFC → stat / harness. Do not change gas parts.

  2. 2 Isolate the first failed step in the sequence

    There is no dual cap and no defrost board.

    Expect: Protect: HPS / LPS / drive OC. This outdoor never defrosts.

  3. 3 Confirm with a number, then the next part

    Weigh-in + line-set. 135SAN SH is the wrong finish. Plate 280ANV = heat-pump twin. Do not stay on this chart.

    Expect: Charge: Recover and weigh. Nameplate + ounces/ft. Not piston SH. · ABCD: Communicating to the Infinity indoor / 59MN7 family. D is not Y.

    If fail: Stay on this plate. The out-of-range reading is the part.

    If pass: Reading in range → the next step in this workflow is the repair.

Test points

Charge

Recover and weigh. Nameplate + ounces/ft. Not piston SH.

ABCD

Communicating to the Infinity indoor / 59MN7 family. D is not Y.

Drive

Inverter LEDs / last fault. No contactor coil 24 VAC test.

Gotchas

  • 180B on an older invoice is this family. 191VAN is the current badge.
  • 187B is Evolution two-stage, not this drive. Preferred 148TAN is Y1/Y2, not ABCD.

Related plates

Install this plate

Install Bryant 191VAN as Evolution inverter AC.

Evolution inverter AC

This plate — not the sister SKU

  • Not 280ANV (Evolution HP — RV + defrost). Not 187B (Evolution two-stage scroll, not an inverter). Not 148TAN / 146SAN (Preferred Y1/Y2 or one Y). Not 26-series Carrier R-454B unless the plate says Puron Advance.
  • 180B on an older invoice is this family. 191VAN is the current badge.
  • 187B is Evolution two-stage, not this drive. Preferred 148TAN is Y1/Y2, not ABCD.

Control on this outdoor

  • Evolution events first. Outdoor drive L-codes.
  • There is no defrost sensor to ohm. If you want one, you are on 280ANV.
  • No contactor slam. If you hear one, you are on 148TAN / 146SAN / 135SAN.

Hardware

  • Drive: Inverter scroll · variable capacity · typically R-410A on 180B / 191VAN
  • Bus: Evolution ABCD
  • Charge: Weigh-in + line-set. Not a 135SAN piston SH chart.
  • Sister: Carrier 24VNA6 / 24VNA9

First fire

  1. 1Stat event list. Bus vs drive.
  2. 2There is no dual cap and no defrost board.
  3. 3Weigh-in + line-set. 135SAN SH is the wrong finish.
  4. 4Plate 280ANV = heat-pump twin. Do not stay on this chart.

Do not on Bryant 191VAN

  • Not 280ANV (Evolution HP — RV + defrost). Not 187B (Evolution two-stage scroll, not an inverter). Not 148TAN / 146SAN (Preferred Y1/Y2 or one Y). Not 26-series Carrier R-454B unless the plate says Puron Advance.
  • 180B on an older invoice is this family. 191VAN is the current badge.
  • 187B is Evolution two-stage, not this drive. Preferred 148TAN is Y1/Y2, not ABCD.

Maker literature

FieldBench does not host manufacturer files. Each link opens the maker’s own literature page in a new tab.

  • Bryant document searchLiterature searchEnter the full Bryant plate (926TB60100V21, 987MA…). Owner PDFs are public; many I/Os are dealer-gated.Open manufacturer PDF
  • Bryant document searchLiterature searchSearch Bryant 191VAN on the maker’s literature page.Open manufacturer PDF

Warranty and bulletins

Affected models, serial range, symptom, remedy, date. Maker files open on the manufacturer site.

All bulletins

  • Residential limited warranty

    warranty sheet

    Carrier / Bryant registered heat-exchanger terms

    Current 59-series / Evolution / Preferred registered warranty · Limited warranty certificate

    Open factsOpen manufacturer PDF

  • Dealer portals

    dealer

    Where remaining service letters live

    Current-year service letters not on a public literature page · Maker dealer portal

    Open factsOpen manufacturer PDF