AEG i55

AEG error code I55 indicates: AEG Favorit / ProClean / ComfortLift Series: Circulation pump inverter overcurrent detected i55; phase current exceeds peak threshold during wash..

The primary root cause for AEG code I55 is: On AEG (AEG Favorit / ProClean / ComfortLift Series) models: Stator winding phase-to-phase partial short circuit, failing IGBT inverter bridge transistor, or high water viscosity from detergent gelatin..

To resolve error code I55: Measure winding resistance across all 3 phases (must be strictly balanced within 5%: nominal ~45–65 Ω). Replace pump if unbalanced. Rotate selector to 12 o'clock (OFF), press and hold Start/Pause and Exit simultaneously for 4 seconds until the diagnostic LED sequence resets error memory.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if AEG code I55 persists, the physical component causing On AEG (AEG Favorit / ProClean / ComfortLift Series) models: Stator winding phase-to-phase partial short circuit, failing IGBT inverter bridge transistor, or high water viscosity from detergent gelatin. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test 3-Phase Motor Windings / Tacho Generator / Carbon Brushes across Across phase pins U-V, V-W, U-W on motor harness; across tacho pins. Expected nominal reading is 3Ω–6Ω (BLDC phase U-V-W) / 60Ω–180Ω (Tacho coil) / 1.5Ω–3.5Ω (Universal stator). Tolerance: BLDC phase winding values must be strictly balanced within ±0.3Ω. Hand rotation generates 1V–4V AC on tacho..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.