E015
Alfen
Phase Loss / Phase Imbalance Detection
E015 displayed; charger reports phase imbalance or missing phase on three‑phase installation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blown upstream fuse on one phase, Loose phase conductor at charger terminal block, Incorrect phase rotation or wiring, Faulty phase detection circuit on main PCB
How to Fix / Troubleshooting
Safety first: Only a qualified electrician should work on three‑phase supply wiring.
- Step 1 – Check upstream protection: Inspect the three‑phase breaker or fuses feeding the charger. Replace any blown fuses and investigate the cause.
- Step 2 – Verify wiring: With power OFF, open the charger and confirm that L1, L2, L3, N, and PE are correctly connected and tightened to the specified torque.
- Step 3 – Measure voltages: Measure line‑to‑line and line‑to‑neutral voltages for all phases at the charger terminals. All should be within the specified range and balanced.
- Step 4 – Check configuration: Ensure the charger is configured for three‑phase operation if three phases are present, or for single‑phase if only one phase is used.
- Step 5 – PCB diagnostics: If supply is correct but E015 remains, the phase detection circuitry on the main PCB may be faulty.
- When to call a technician: Persistent phase errors require professional diagnostics and possible PCB replacement.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (Phase Detection Circuit)
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