FieldBench
Models
Bryantheat pump

280ANV

Evolution Greenspeed · inverter HP

Bryant Evolution inverter heat pump (factory twin of Carrier 25VNA4 / Greenspeed). Outdoor drive + ABCD. Faults are inverter/comm/sensor, not a contactor-and-cap story. 189BNV is a Preferred inverter cousin — weigh-in still applies; the wall control may not be full Evolution.

Not a 126BNA / 113A / 114A Comfort single-stage (contactor, dual cap, piston/TXV). Not a 926T furnace IFC. Do not charge it like a Comfort piston unit.

Diagnose this modelInstall notesBoard cross-refField wiring

Drive

Inverter scroll · variable capacity

Bus

Evolution ABCD to the wall control and indoor

Charge

Weigh-in + line-set. Superheat is not a 410A piston chart.

Sister

Carrier 25VNA4 · 189BNV Preferred inverter cousin

This board

Outdoor inverter + Evolution UI

  • Evolution thermostat events first.
  • Outdoor board / inverter LED for drive faults (overcurrent, discharge, comm). L5/L4-class on the drive.
  • No conventional Y1/Y2 staging — capacity is serial. There is no outdoor contactor to listen for.

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

Universal swap

No universal

Inverter outdoor + Evolution UI. No furnace IFC universal.

White-Rodgers

—

ICM

—

Honeywell

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

After you pull the dead card

  1. 1OEM Greenspeed outdoor control. 25VNA4 is the Carrier twin — still no universal.

Field wiring

Written landings for Bryant 280ANV. Not a factory schematic.

Infinity / Evolution inverter HP
ABCD + RV / defrost on the driveR-410A

25VNA4 / 280ANV. Same ABCD as 24VNA6 — plus a reversing valve and defrost on the outdoor drive.

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 indoor on ABCD. 191VAN is the AC twin — no RV.

ABCD heat pump

Infinity / Evolution HP outdoor.

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

  • DataABCD throughout

    Data + 24V C/D. No O/B stat wire on most of these.

  • 24VRV and defrost

    On the outdoor drive. Not a furnace function.

Prove it

  • Same ABCD prove as 24VNA6, then confirm this plate is the HP (RV + outdoor coil sensor).

Do not

  • Do not use this on 24VNA6 / 191VAN. Those have no RV.
  • Do not charge it like a 24ACC6 piston unit.

Included so the HP twin is not silently reused as the AC diagram.

Sequence

  1. 1

    Call

    Wall control requests capacity. Indoor IFC sets CFM. Outdoor inverter ramps.

  2. 2

    Defrost

    Inverter + IFC coordinate. A failed outdoor coil sensor looks like always iced or 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.

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

    On Bryant 280ANV 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, 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.

    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.

HPS / LPS

Pressure protection

lockout

Still real on an inverter.

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

    On Bryant 280ANV 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.

    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.

Inverter

Drive overcurrent / overheat

lockout

L5/L4-class faults on the drive.

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

    On Bryant 280ANV 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.

    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

No cool, Evolution HP

Fan indoor, outdoor silent.

  1. 1 Prove the call and the live code

    Stat event list. If it is a bus fault, do not gauge up yet.

    Expect: Write whatever Outdoor inverter + Evolution UI is showing. Evolution last 10. Outdoor inverter 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

    Outdoor powered? Inverter LEDs?

    Expect: Defrost: Inverter + IFC coordinate. A failed outdoor coil sensor looks like always iced or never defrosts.

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

    Charge is weigh-in plus line-set. Superheat on a variable drive is not a 410A piston chart. Indoor must be Evolution (987M / 986T / matching fan coil). A 926T on this outdoor is the wrong control scheme on most jobs.

    Expect: Charge: Recover and weigh. Nameplate + ounces/ft. · ABCD: Evolution pair. Not Y1/Y2.

    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.

ABCD

Evolution pair. Not Y1/Y2.

Gotchas

  • Carrier 25VNA4 is the factory twin.
  • 189BNV is Preferred inverter — similar drive, not always full Evolution ABCD. Read that outdoor board.

Related plates

Install this plate

Install 280ANV as Evolution Greenspeed. Weigh-in inverter. No contactor, no dual cap.

Inverter HP · Evolution ABCD · weigh-in charge · indoor must be Evolution (987M typical)

Charge & pair

  • Factory charge + line-set adder from the 280ANV / 25VNA4 I/O. Not a piston SH target.
  • ABCD to the Evolution indoor and wall control. A 926T Preferred indoor is the wrong bus.

First fire

  1. 1Pair the bus first. Inverter will not run correctly as a 24V Y contactor unit.
  2. 2Weigh-in, then a cool call and a heat call. Drive faults live on this outdoor, not the furnace 31/33/34.

Do not on Bryant 280ANV

  • Do not apply 24ACC6 contactor + cap diagnostics.
  • Do not charge by 10 °F SC like a single-stage TXV 14-SEER.

Maker literature

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

  • 280ANV product pageProduct pageEvolution Greenspeed inverter HP. Twin of Carrier 25VNA4.Open manufacturer PDF
  • 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 280ANV 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