JCB
Control Power Loss
Control panel is completely dead; no display or indicator lights when battery is connected.
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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 DC control fuse, Disconnected battery supply to panel, Faulty key switch, Internal controller failure
How to Fix / Troubleshooting
Safety: Confirm auto‑start is disabled and mains is isolated before opening the control panel.
- Check battery voltage: Verify correct DC voltage at the control panel supply terminals.
- Inspect fuses: Locate and test DC control fuses in the JCB panel. Replace any blown fuses with the correct rating and investigate cause.
- Key switch: Test the key switch or power button for continuity in the ON position.
- Controller replacement: If supply and fuses are good but the controller remains dead, the controller may need replacement or factory repair.
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Repair Difficulty
Medium
3/5
Required Part
Generator Controller
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