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RUN/ERROR LEDs: 14 flashes/sec RUN, 14 flashes/sec ERROR alternating

Run and Error LEDs flash rapidly in sequence — Brownout detected

Carrier · 38AP Air Handler

What does RUN/ERROR LEDs: 14 flashes/sec RUN, 14 flashes/sec ERROR alternating mean?

The controller has detected a significant voltage drop (brownout). It has entered a recovery state and will attempt to restart after a delay.

Common Causes

  • Significant power supply voltage drop (brownout)
  • Unstable power conditions

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Wait for the controller's automatic recovery process.

  2. 2

    Check the stability of the main power supply.

  3. 3

    Consider using a surge protector or UPS if power issues are frequent.

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