Broken clips

[Kaspars Holsteins 1]

I have received open box with broken device. It's not an issue - I will return it. But...

I'm wondering what could possibly caused clips to broke? Bug in firmware? I can't believe someone could broke it during installation. It looks like motor was pushing pin back till cover lifted up and broke these pins.

Any explanation? Anything to look after not to accidentally repeat that on my new device?

 

BTW. Fibaro mechanism looks much more fragile comparing with danfoss.

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[petergebruers 1,268]

Tagging @m.roszak - he might be interested. I have never seen such a case. I can imagine it has happened as you said though. The FGT detects if the motor spins, it uses an optical sensor to do that (and possibly other means like current sensing, but Fibaro does not like to discuss this in public). If the motor stalls, FGT detects this and displays "motor failure" - if it was included on a controller that captures these notifications. I think it is hard to say what has happened.

[m.roszak 763]

Could you give me a serial number and firmware version?

[jakub.jezek 370]

8 minutes ago, petergebruers said:

I have never seen such a case.

I did. This could happen when you not properly dismount TRV and without putting TRV into standby, before dismount.

 

Valve control looking for pressure (without pressure, it starts to close TRV) and then it could start recalibration (close valve, open it) When it get to fully open, it drives too much down and then tries up, hence damaged clips, creating offset and valve control stucked inside device.

 

I consulted this with one Fibaro CZ dealer and he told me that.

 

@Kaspars Holsteins, TRV is damaged and only service in Fibaro can repair it.

[petergebruers 1,268]

25 minutes ago, jakub.jezek said:

Valve control looking for pressure (without pressure, it starts to close TRV) and then it could start recalibration (close valve, open it) When it get to fully open, it drives too much down and then tries up, hence damaged clips, creating offset and valve control stucked inside device.

Clever thinking... That might be part of the story, and it might be firmware dependent, but it cannot be the whole story.

I have seen a few reports of people waking up the FGT, but not mounting it on a radiator. If they did not read the manual, they'll notice it keeps calibrating the FGT every 10 minutes and do not know how to stop that. They need to enter the "cyan" menu, aka "standby".

I have tested that myself... Letting it calibrate without pressure did not damage my FGT. I let it do that for several hours. I tested that on FW 4.3 and 4.4 but not on 4.0. But I can assure you, the 4.0 was mounted and dismounted several times and, knowing myself, I must have forgotten to use "standby" at some point, only noticing it when it calibrated, off the radiator.

 

I would not recommend anyone to try it, you really must use the "cyan" menu before you dismount the FGT.

 

AFAIK all electronic TRVs have this requirement (eg M menu on Danfoss TRV). 

 

I think, to explain this kind of damage to the FGT, we're still missing something.

[jakub.jezek 370]

@petergebruers, I'm too testing sometimes without valve. I have some spare valves, so i do my tests and run factory restore (getting int standby automatically). They are not that overpriced About 8 Euro each in CZ.

 

Yesterday CZ dealer came and we had discussed this for about 15 minutes.

 

7 minutes ago, petergebruers said:

it might be firmware dependent

Could be firmware depended. Probably timing calibration from newest Roller shutter could be used (updated into PID/ Fibaro TRV mechanism).

 

12 minutes ago, petergebruers said:

I think, to explain this kind of damage to the FGT, we're still missing something.

Not it is probably best to look under the hood onto clips. @m.roszak, is glass fiber used in plastic of valve control holding (clips)? Gun manufacturers using it to enhance durability and reliability of polymer in Frames (manufacturers like CZUB, HS Product, probably even Glock).  

[Kaspars Holsteins 1]

2 hours ago, m.roszak said:

Could you give me a serial number and firmware version?

I sent it back to shop.

 

Thanks for some explanations. OK, then with new device - mount first, only then update firmware if needed!

[jakub.jezek 370]

2 hours ago, Kaspars Holsteins said:

mount first, only then update firmware if needed

Firmware will be needed to update. I would suggest to update firmware before mount. Like i wrote few post above, that this issue probably happens when you dismount TRV without setting it into standby.

[petergebruers 1,268]

56 minutes ago, jakub.jezek said:

I would suggest to update firmware before mount.

Yes, but he only has 10 minutes to do that.

 

As soon as he wakes the device (from standby, as it is shipped in this modus) a 10 minute timer start... After 10 minutes, the device will calibrate.

 

And you said:

 

6 hours ago, jakub.jezek said:

Valve control looking for pressure (without pressure, it starts to close TRV) and then it could start recalibration (close valve, open it) When it get to fully open, it drives too much down and then tries up, hence damaged clips, creating offset and valve control stucked inside device.

 

It is "open" when you take it out of the box. It does not spin the motor for a very long time when you wake it.

 

But after 10 minutes it will do "close" then "open". Unless you are fast enough to enter "standby" again. Cyan menu.

Edited November 21, 2018 by petergebruers

[Kaspars Holsteins 1]

Amazon exchanged used/broken device with fresh new. Installed and was working fine out of box. Only after a day it suggested firmware update to latest version. That also went fine.

Have to remember about "standby" whenever device needs to be unmounted.