Zencar
No Power / Dead Unit
Charger completely dead: no lights, no display, no relay click when powered; breaker is ON.
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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
Tripped internal fuse on power board, Failed low-voltage power supply, Open circuit in input wiring, Faulty main control PCB not booting
How to Fix / Troubleshooting
Safety first: This involves mains voltage. Only work inside the unit if you are qualified. Always turn off the breaker and verify zero voltage before opening.
- Verify supply: Use a multimeter at the charger input terminals to confirm correct voltage is present when the breaker is ON.
- Check internal fuses: With power OFF, open the charger and locate any internal fuses on the power supply module or main board. Replace only with identical type and rating if blown, and investigate why it blew.
- Inspect for obvious damage: Look for burnt components, melted plastic, or strong odor from the power supply or main control PCB.
- Test low-voltage output: If equipped and you are qualified, measure the low-voltage rails (e.g., 5V, 12V) from the power supply to the main board. No output indicates a failed low-voltage power supply module.
- If power supply is good but unit is dead: The main control PCB is likely defective and should be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Low-Voltage Power Supply Module
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