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UA

UA - Compressor over current (Terminal relay operation) in outdoor unit

MHI · R410A Systems

Was bedeutet UA ?

This code signifies that the outdoor unit's compressor has drawn excessive current, activating the terminal relay as a protective measure.

Häufige Ursachen

  • Overload on the compressor.
  • Faulty terminal relay.
  • Electrical supply issues to the compressor.
  • Compressor attempting to start against high pressure.

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 allow the unit to rest for some time.

  2. 2

    Check for any obvious obstructions around the outdoor unit that might restrict airflow.

  3. 3

    If the problem continues, contact a qualified HVAC technician to inspect the compressor, terminal relay, and electrical connections.

  4. 4

    Avoid continuous attempts to restart the unit, as this may cause further 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