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RUN/ERROR LEDs: 2 flashes/sec RUN, Solid ON ERROR

Run LED flashes, Error LED solid on — Execution halted due to frequent errors

Carrier · 38AP Air Handler

What does RUN/ERROR LEDs: 2 flashes/sec RUN, Solid ON ERROR mean?

The controller has halted program execution due to repeated system errors or control program failures. This indicates a significant issue requiring investigation.

Common Causes

  • Frequent system errors
  • Control programs have halted
  • Underlying hardware or software issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Investigate the specific system errors that are occurring.

  2. 2

    Restart the controller.

  3. 3

    If errors persist, contact technical support for diagnosis.

  4. 4

    Consider checking for firmware updates.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

A051A051 — Circuit A, Compressor 1 Stuck On Failure AlarmA052A052 — Circuit A, Compressor 2 Stuck On Failure AlarmA053A053 — Circuit A, Compressor 3 Stuck On Failure Alarm
Source: Carrier 38AP Air Handler
Open Manual (Page 214)Search more codes in this manual