Mitsubishi Electric · FR-A800Fault Code E.UVTWarning
Mitsubishi FR-A800 — E.UVT Undervoltage
Occurs when the main-circuit voltage drops too low. Supply sag, phase loss or capacitor ageing is the cause.
Updated: 2026-07-05
Symptoms
- E.UVT on power/load
- Frequent during supply fluctuations
- Stop under load
Probable Causes
- Supply voltage sag
- Input phase loss
- Capacitor ageing
Checkpoints
- Measure mains under load
- Verify input phases
- Assess capacitor condition
Solution
If mains is healthy, aged capacitors are replaced during repair.
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