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No rated voltage in the power supply

No rated voltage in power supply — Main power issue

Mitsubishi Electric · Air Conditioning

What does No rated voltage in the power supply mean?

The unit is not receiving the correct voltage from the main power source. This could be due to a tripped breaker, a power outage, or an issue with the electrical supply.

Common Causes

  • Power outage
  • Tripped circuit breaker
  • Issue with the building's electrical system

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check your home's circuit breakers and reset any that are tripped.

  2. 2

    Verify that other appliances in your home are receiving power.

  3. 3

    If the power supply issue affects multiple circuits or the entire home, contact your utility provider or an electrician.

Browse all codes in this manual (170)
Verified technical data. Last updated: April 2026

Related Faults

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 30)Search more codes in this manual