Senville Unstable Control Voltage or PCB Issue

Indoor unit display or LEDs flicker or behave erratically; unit may reset randomly.

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.

Possible Causes

Loose power connections, Faulty indoor PCB power supply section, Electrical noise or surges, Water ingress into indoor electronics

Safety: Turn off power before inspecting wiring or boards.

Step 1 – Check for moisture: Inspect the indoor unit for signs of water leaks onto the PCB. Fix any drainage issues first.
Step 2 – Inspect wiring: Tighten all terminal screws and check for burnt or loose connectors.
Step 3 – Surge protection: Consider installing a surge protector dedicated to the Senville system.
Step 4 – Replace PCB: If flickering persists, the indoor PCB may be failing and should be replaced.

Medium 3/5

Indoor Main Control Board (PCB)

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