Wiring & Electrical
Electrical wiring issues, voltage problems, and installation questions
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- TapHome bus: measure Bus A and Bus B Modules on the TapHome bus drop out, the bus analyzer shows errors or push buttons react late. A multimeter check of Bus A and Bus B against GND at the Core and at the modules shows a loose terminal, an unconnected wire or a faulty module.
- DALI lights switch on by themselves DALI lights behind a DALI gateway switch on at minimum or change brightness without any command, usually the same few lights each time. The bus is disturbed for a moment — by the gateway, a short on a branch or a voltage drop.
- Modbus RTU: device drops out, no common GND A Modbus RTU device with its own power supply, such as a hybrid inverter, heat pump or heat recovery unit, goes into error for a few tens of seconds and its values have gaps, because only A and B are wired and its ground floats against the ground of the Core.
- Push button: every press is a long press A push button on a universal input reports long presses, series of short presses and the error "pressed for more than 1 minute" when its input is active while the button is not pressed, typically with a normally closed button or wiring.
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