Discuss Block of 200+ flats, eleven single channel hot water timers blown this week alone. in the UK Electrical Forum area at ElectriciansForums.net
A picture of the underside of the PCB would be handy.I don’t think the burned out disc is an MOV. The timer uses a transformer less way of producing low voltage dc to operate the electronics. I reckon one can see a bridge rectifier - the white block component, and a disc capacitor in series with a resistor of suitable power rating together forming a mains to low voltage dropper. The placement of the resistor and the disc capacitor makes me think their right hand ends are connected to Lin and Nin respectively and their left hand ends to the ac inputs of the bridge rectifier which are normally the inner two leads for this style of rectifier. There is a smoothing capacitor to the left of the bridge rectifier. I reckon the gold rimmed cylindrical component above the relay is a battery for keep alive in the event of power cut and accumulator to handle short duration current surges when the relay turns on.
Was dreading that request, damn thing was riveted in.A picture of the underside of the PCB would be handy.
Damn, was hoping my initial guess was a stroke of genius.?I was wrong ?
Reply to Block of 200+ flats, eleven single channel hot water timers blown this week alone. in the UK Electrical Forum area at ElectriciansForums.net
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