When do I need an LED bypass?

Use an LED bypass when the circuit load is too low for stable operation, when smart bulbs in Remote Mode do not provide enough off-state load, or when flicker/flashing continues after checking bulb compatibility and brightness settings.

Where should the LED bypass be installed?

In a typical no-neutral lighting circuit, install the bypass across live and neutral on the lighting circuit, usually at the light fitting or before the first light fitting, following the official Candeo bypass wiring instructions.

Can the bypass be installed at the switch?

Only if the required live and neutral for the bypass are present at the switch and the official diagram supports that arrangement. The dimmer itself does not take neutral. In many UK no-neutral switch drops the neutral is not present at the switch, so the bypass must be installed at the light fitting.

Does the bypass need to be installed at the light fitting?

Usually yes for a UK no-neutral switch drop, because neutral is commonly available at the light fitting rather than at the switch. The bypass should be across L and N on the lighting circuit, not across live and switched live.

Can the switched live be used instead of neutral for the bypass?

No. The switched live is not neutral and must not be used as a neutral substitute. A bypass needs the correct live and neutral points shown in the wiring instructions.

What should I do if there is no neutral at the switch?

Install the bypass at the light fitting or another suitable point in the lighting circuit where both live and neutral are available. If you cannot safely identify those conductors, use a qualified electrician.

Can the bypass be used as a dummy load in Remote Mode?

Yes. In Remote Mode with no conventional light load, the LED bypass can be used as the dummy load if wired according to the official no-load/Remote Mode diagram.

Why are my smart bulbs flickering, flashing, or pulsing when used with the RD1-Pro?

The most common reason is insufficient load, especially when smart bulbs are off and drawing very little current. Other causes include the RD1-Pro being in the wrong mode, the bypass being absent or incorrectly positioned, or smart bulbs being exposed to dimming instead of permanent power.

What should I do if one bypass does not stop the flickering?

Confirm the bypass is wired across the correct live and neutral points, check bulb quantity and off-state load, test with a conventional dimmable bulb, and confirm the device is in Remote Mode. If all is correct but the circuit is still unstable, a second bypass in parallel may be required.

Can I install a second bypass in parallel?

Yes, a second LED bypass can be wired in parallel in cases where one bypass does not fully stabilise a very low-load smart-bulb circuit.

How do I confirm whether the bypass is wired correctly?

Verify that it is across the correct L and N points on the lighting circuit, not across switched live and not into the RD1-Pro neutral because the dimmer has no neutral terminal. Use the official diagram and a qualified electrician if there is any uncertainty.

Why does a smart bulb's load while off matter?

In Remote Mode the circuit remains powered, but a smart bulb that is logically off may draw only a tiny standby current. If the combined standby current is too low, the dimmer circuit may be unstable and the bulbs can flash or pulse.

What troubleshooting information should I provide if flickering continues?

Please include what bulbs are fitted, how many bulbs are on the circuit, their wattage, brand and model, which mode the RD1-Pro is in, whether it works with a standard dimmable bulb, whether a bypass is fitted, exactly where the bypass is connected, and whether neutral is present at the fitting or switch.