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UF

UF - Compressor over current (start-up locked or operating locked) cut off in outdoor unit

MHI · R410A Systems

Was bedeutet UF ?

This error indicates that the compressor has either failed to start up or has locked during operation, drawing excessive current and triggering a protective shutdown.

Häufige Ursachen

  • Compressor motor failure.
  • Electrical supply issues to the compressor.
  • Start capacitor fault.
  • Insufficient refrigerant or system imbalance.
  • Compressor seized or mechanically locked.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Turn off the main power to the AC system at the circuit breaker and wait at least 30 minutes.

  2. 2

    Inspect the outdoor unit for any visible signs of damage or unusual conditions.

  3. 3

    If the error persists, contact a qualified HVAC technician immediately to inspect the compressor, starting components, and refrigerant levels.

  4. 4

    Do not force the unit to operate, as this can cause severe damage.

Alle Codes in diesem Handbuch durchsuchen (58)
Verifizierte technische Daten. Zuletzt aktualisiert: April 2026

Verwandte Fehlercodes

E0E0 - Transmitting/receiving signal error in indoor unitE12E12 - Address setting conflict or auto address failureE14E14 - 3 flashes - Master/slave system wiring or SW settings error
Quelle: MHI R410A Systems
Open Manual (Page 1)Mehr Codes in diesem Handbuch suchen