Hi all, wondering if anyone can help me with a recent issue I've had with electric UFH in a small flat. Found that when the UFH starts, the RCD trips immediately - this started last Saturday while I was away. Prior to this, I had heard some buzzing coming from near the UFH unit controller in my kitchen, but didn't realise there was an issue.
Here are some details of the system
So, pulled out the multi-meter and ran a few tests. Results as follows:
Insulation test on Line to earth seems okay, but Neutral to earth is not? Am I correct in thinking I should be getting the same reading across both of this. When I carried out the test, the RCD was off, but Main switch was on.
Does anyone have any idea what the problem might be, or what further tests I should carry out to diagnose the issue? Was hoping this was a problem with the main wiring or controller, as I can't afford to take up teh floor right now, and it's not going to be a fun Christmas in Scotland with no heating .
Any help is much appreciated
Here are some details of the system
- Controller: TH-132 (15A RES Max.)
- Mat area (total) ~ 5m2 (covers a small kitchen and hallway)
- Installation Date ~2005 (it was installed before I moved in, so I don't have any manufacturers details / specs)
So, pulled out the multi-meter and ran a few tests. Results as follows:
- Tested resistance across mat (LOAD L/N) = ~28 ohms
- L-E > 1 Mega Ohm
- N-E = 29 ohms
Insulation test on Line to earth seems okay, but Neutral to earth is not? Am I correct in thinking I should be getting the same reading across both of this. When I carried out the test, the RCD was off, but Main switch was on.
Does anyone have any idea what the problem might be, or what further tests I should carry out to diagnose the issue? Was hoping this was a problem with the main wiring or controller, as I can't afford to take up teh floor right now, and it's not going to be a fun Christmas in Scotland with no heating .
Any help is much appreciated