E04
DAB
Internal Electronics / Inverter Fault
Display shows E04 and pump will not start, sometimes after a power surge or lightning storm
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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
Damaged power electronics on DAB inverter board, Surge damage to control PCB, Loose internal connectors between control panel and power board, Moisture ingress into control housing
How to Fix / Troubleshooting
Safety first: Disconnect power at the breaker. Electronic repairs should only be done by qualified personnel.
Steps to check:
- Inspect control housing: Open the DAB control cover (if user‑serviceable). Look for signs of moisture, corrosion, or burnt components on the PCB.
- Check internal connectors: Gently press ribbon cables and plug connectors into their sockets on the inverter/control module to ensure good contact.
- Dry the unit: If moisture is present, allow the control box to dry completely in a warm, dry environment. Do not use direct heat guns on electronics.
- Power cycle: Re‑energize the pump after at least 10–15 minutes of being off. Clear the error and attempt a start.
- If E04 remains: The inverter/control module is likely defective and must be replaced as a complete unit. Do not attempt component‑level repair unless you are an electronics specialist.
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Repair Difficulty
Professional Required
5/5
Required Part
DAB inverter/control module
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