E15
Etna
Main PCB Power Supply Fault
Error appears immediately after power‑on, no functions available
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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
Failed low‑voltage power supply on main PCB, shorted component on control board, incorrect mains connection at terminal block
How to Fix / Troubleshooting
Safety first: This fault involves live mains circuitry. Only qualified persons should work on the power supply. Always disconnect power before removing covers.
- Check terminal block: Verify that the mains supply is correctly connected to the oven terminal block according to the Etna wiring diagram (single‑phase or two‑phase as applicable). Tighten all screws.
- Visual PCB inspection: Remove the control panel and inspect the main PCB for burned components, bulging capacitors, or cracked solder joints in the power supply area.
- Measure supply voltages: With appropriate safety precautions, measure the low‑voltage outputs (e.g., 5V, 12V) from the power supply section. If missing or unstable, the main PCB must be replaced.
- Do not bypass safety: Never attempt to bypass fuses or safety components on the PCB. Replace the entire board with the correct Etna spare part.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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