mypros+
Error code reference

Mitsubishi Air Conditioner Error Code E.UVT

Undervoltage

Mitsubishi codesMitsubishi air conditioner codes
Avg. service call
$285
National average. Trip fee plus diagnostic plus labor. Before parts.
MyPros+ 3-day pass
$9.95
Same diagnostic steps, on your phone. Start now.
You keep in your pocket
~$275
Even before you buy the part.
Skip the service call. Fix it yourself.
Full procedure unlocks instantly.
Get Started

What the E.UVT error code actually means

This error means the air conditioner detected that the incoming electrical voltage dropped too low for the unit to operate safely, so it shut itself off to avoid damage. Think of it like a brownout condition where the power supply became too weak to run the system properly. A technician will need to check the electrical supply and internal wiring connections before the unit can restart safely.

Diagnostic procedure

The full E.UVT procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check if a high-capacity motor is driven, check jumper across P/+ and P1, and check power supply system.
Unlock with pass
Unlock with pass
Unlock with pass
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock E.UVT procedure $9.95

Or subscribe: $29/month for unlimited access to all codes plus Max AI diagnostics.

Most common causes of E.UVT

Ranked by how often they cause this code
  1. 1Utility or site voltage sag
  2. 2Missing or failed P/+ to P1 jumper
  3. 3High-capacity motor on shared circuit
  4. 4Undersized or degraded supply wiring
  5. 5Loose or corroded power supply connections

Most DIYers save hundreds by diagnosing before ordering parts.

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass

Questions people ask about E.UVT

What does E.UVT mean on a Mitsubishi air_conditioner?
E.UVT is an undervoltage protection fault. It activates when the AC power supply voltage drops to approximately 150 VAC or below on 200V class units, or to approximately 300 VAC or below on 400V class units. When this occurs, the inverter output is automatically shut off to protect the compressor and drive electronics from operating under unsafe voltage conditions.
Is it safe to keep running the air conditioner with an E.UVT error?
No. The E.UVT fault causes the inverter output to shut off automatically as a protective measure. Attempting to bypass or repeatedly restart the unit without addressing the underlying voltage issue can damage the inverter power transistors, compressor motor windings, and control board. The root cause should be corrected before the system is returned to service.
How much does it cost to repair an E.UVT error on a Mitsubishi air conditioner?
Repair costs vary widely depending on the cause. If the issue is simply a missing or failed jumper across the P/+ and P1 terminals, costs could range from a few dollars in parts to a standard diagnostic service call fee. If the problem involves electrical supply upgrades, new wiring runs, or inverter board replacement, costs could range from several hundred to over a thousand dollars. A technician assessment is needed to provide an accurate estimate.
Can I fix an E.UVT error myself?
Some causes, such as a tripped breaker or a shared circuit being overloaded by another appliance, may be identifiable without professional help. However, diagnosing internal inverter components like the P/+ to P1 jumper, measuring DC bus voltage, and safely working inside the inverter section requires electrical knowledge and proper safety precautions. A licensed HVAC or electrical technician is strongly recommended for full diagnosis and repair.
Will resetting the unit clear the E.UVT error?
A reset may temporarily clear the fault display, but if the underlying voltage problem has not been corrected, the error will return as soon as the inverter detects the low voltage condition again. A persistent E.UVT code that returns after reset indicates an ongoing supply voltage issue or a hardware fault such as a missing P/+ to P1 jumper that must be addressed directly.

Related Mitsubishi air conditioner error codes

All Mitsubishi air conditioner codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass