MTU Onsite Energy
Control Power Loss
Control panel dead, no display or indicator lights, generator will not respond
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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 control power fuse, Failed 24 VDC power supply, Open control circuit breaker, Loose control wiring
How to Fix / Troubleshooting
Safety first: Verify all sources are de-energized before opening the control panel.
- Check incoming power: Confirm that AC supply to the battery charger and any auxiliary supplies is present.
- Inspect fuses and breakers: Locate and test control power fuses and miniature breakers. Replace or reset as needed.
- Measure DC control voltage: Use a multimeter to check 24 VDC at the controller terminals. If absent, troubleshoot the DC power supply and wiring.
- Wiring inspection: Tighten loose terminals and look for damaged control cables.
- Controller status: If proper power is present but the controller remains dead, the controller itself may need replacement by an MTU technician.
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Repair Difficulty
Hard
4/5
Required Part
24 VDC Power Supply Module
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