Saci
Display Power / Interface Failure
Display on Saci variable‑speed pump is blank, but motor hums or runs
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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 low‑voltage fuse on PCB, Failed display module, Loose ribbon cable, Surge damage
How to Fix / Troubleshooting
Safety first: Turn off power and wait for capacitors to discharge before opening the control housing.
- Check connections: Ensure the ribbon cable between the main PCB and display/keypad is firmly seated at both ends.
- Inspect for fuses: Some Saci boards include small fuses for the low‑voltage supply. Check and replace only with identical types if blown.
- Test motor control: If the pump still responds to external automation or fixed‑speed inputs, the issue is likely limited to the display module.
A non‑functional display usually requires replacement of the display/keypad assembly or entire control module.
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Repair Difficulty
Hard
4/5
Required Part
Keypad / Display Panel
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