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RUN/ERROR LEDs: 7 flashes/sec RUN, 7 flashes/sec ERROR alternating

Run and Error LEDs flash in sequence — 10-second recovery period after brownout

Carrier · 38AP Air Handler

What does RUN/ERROR LEDs: 7 flashes/sec RUN, 7 flashes/sec ERROR alternating mean?

The controller is in a 10-second recovery period following a power disturbance (brownout). It is preparing to resume normal operation.

Common Causes

  • Power disturbance (brownout) detected
  • Controller is in a recovery state

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Wait for the 10-second recovery period to complete.

  2. 2

    Observe the unit's operation after recovery.

  3. 3

    Ensure stable power supply to prevent future brownouts.

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