Carrier

Inverter

Lockout

Drive overcurrent / overheat

L5/L4-class faults on the drive.

3 plates — walk the one on the cabinet

First check

1 Let it cool, then read the drive LED

On Carrier 24VNA6 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.

The rest of the walkthrough is Diagnose.

On the plates

Compressor to ground, heat sink, supply voltage. Weigh-in vs nameplate.
These L-codes do not exist on 24ACC6. If you are looking at a contactor, you are on the wrong outdoor.

Plates that use Inverter

24VNA6
Infinity Greenspeed inverter AC
Diagnose 24VNA6 — Sign in
25VNA4
Infinity Greenspeed inverter HP
Diagnose 25VNA4 — Sign in
26VNA1
Infinity inverter AC · Puron Advance (R-454B)
Diagnose 26VNA1 — Sign in

Same number, other makers

Inverter on Carrier is not the same code on these plates.