CentaurPlus C27

For more information, see this article's corresponding Wikipedia page: Device.

Preliminary Information
Leak Risk	High
Batteries	None
Destructive Entry	No

Known Issues

Symptom or Problem Encountered

Sometimes there's no hot water.

Causes

• Even if the timer activates, the relay does not always trip when the heating relay is active at the same time.

Solutions

• The relay and microcontroller supply are derived from a capacitative dropper circuit. Replacing the yellow X2 capacitor restores the voltage supply.

Disassembly Notes

Remove the three screws from the back side. One is under a tamper warning sticker.

The back slides off over the power pins. The battery can be left in place.

Original Parts

Basic PCB Name

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
	1	.33 µF	275 AC					0 °C	MPPRRB/X2

Replacement Parts

Basic PCB Name

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
			Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.