E05
DAB
Phase Loss / Phase Imbalance (for three‑phase DAB pool pumps with inverter)
Pump display shows E05 and motor does not run, sometimes accompanied by a clicking sound
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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
Missing phase on three‑phase supply, Loose phase connection in terminal block, Faulty output stage on DAB inverter, Internal motor winding open circuit
How to Fix / Troubleshooting
Safety first: Only a qualified electrician should work on three‑phase circuits. Isolate power and verify with a meter before touching conductors.
Steps to check:
- Verify three‑phase supply: Measure voltage between all three phases (L1‑L2, L2‑L3, L1‑L3). All should be within the specified range and balanced.
- Inspect terminal block: Open the DAB pump terminal box. Tighten all phase and earth screws. Look for heat damage or discoloured insulation.
- Check motor continuity: With power off and disconnected, measure resistance between motor windings. An open circuit indicates a failed winding.
- Reset the inverter: After correcting any supply issues, power cycle the unit and clear E05.
- If supply and motor are OK: The inverter output stage is likely damaged and the DAB inverter/control module should be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
DAB inverter/control module
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