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Operation 5 Times / Timer 1A

Operation LED blinks 5 times and Timer LED shows 1A — Compressor location error.

Fujitsu · 410A Multi-Zone Mini-Split Systems

What does Operation 5 Times / Timer 1A mean?

The compressor speed is not synchronizing with the control signal, or the compressor failed to start.

Common Causes

  • 2-way or 3-way valves on the refrigerant lines are not fully open.
  • Compressor malfunction (e.g., winding resistance issue, loose leak wire).
  • Problem with the refrigeration cycle condition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the power to the unit by turning it off at the circuit breaker, waiting 30 seconds, then turning it back on.

  2. 2

    Ensure that any manual valves on the refrigerant lines (if accessible) are fully open.

  3. 3

    If the error persists, professional service is needed to inspect the compressor and refrigeration cycle.

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

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Source: Fujitsu 410A Multi-Zone Mini-Split Systems
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