[Solved] Vaillant Calormatic 470: Clock Settings Lost, Possible Battery Issue? SR516 Battery Spots?

Good morning, I am asking for help, I have a problem with the VR 21 external sensor, the controller has stopped working, the message clean the sensor, of course cleaned, left for 2 days in the sun and nothing works, I dismantled the measured battery and the cell - unfortunately no communication between the devices. Can any of you esteemed colleagues tell me what could have been damaged, did you have such failures??

I confirm. 0.22F 5.5V keeps the memory.

PLN 18 per element (panasonic) + 20 soldering.

Thanks guys for the tips.

I am also a victim of the clock in the Calormatic 470, which loses the date and time even after a few seconds of power outages.
I want to replace the capacitor and I have a question: is the capacitor to be replaced in the wireless regulator (it is constantly powered by batteries), or in the module mounted on the stove (there are power outages)?
Thank you in advance for your answer.

Marek-Łódź wrote:

I am also a victim of the clock in the Calormatic 470, which loses the date and time even after a few seconds of power outages.
I want to replace the capacitor and I have a question: is the capacitor to be replaced in the wireless regulator (it is constantly powered by batteries), or in the module mounted on the stove (there are power outages)?
Thank you in advance for your answer.

Calormatic has a power supply via a cable from the furnace (something about 20V I don't remember exactly) and the capacitor is in it.
Follow the topic from the beginning.

Yesterday I had no electricity for 8 hours and it maintained the parameters.

Many thanks for your quick reply!
I will install a 0.22F 5.5V capacitor and share information about how it works.

The problem with the capacitor occurs even if the stove is connected to the UPS. Replacement is necessary.

If anyone is interested, I can fix this driver in terms of maintaining the date and time. More info on priv.

arigato wrote:

A beautiful read taken straight from the descriptions regarding the maintenance of the clock (timer) in VCRs. There was also the so-called supercapacitors, but they lasted more than two years. In mine - about seven. Instead, I used three ordinary 1.5V batteries, type R6 (4.5V) with one diode soldered in the reverse direction, which cured the whole device of its flaws. I applied the first treatment in 1998. Thanks to the diode, there is no question of a possible attempt to recharge the battery.
I think I helped

I just wrote about the fact that it is better to put a battery with a diode than these supercapacitors. They are kind of crap because they fall, according to my observations after 3-4 years at the latest and such a CR2032 battery will last 10 years and its replacement from the motherboard stand is 5s. So the choice is obvious.

Added after 9 [minutes]:

[quote="williams"The Calormatic has a power supply via a cable from the furnace (something around 20V I don't remember exactly) and the capacitor is in it.
Follow the topic from the beginning.
Yesterday I had no electricity for 8 hours and kept the parameters.[/quote]
I don't know what boiler you have, but in my V. ECOTEC vc 205/5-5 there is no supercapacitor on the motherboard, the data is stored in the EEPROM memory. I also do not have any additional power supply from the boiler on the EBUS bus.

Added after 12 [minutes]:

ls_77 wrote:

lukas_m wrote:

Has anyone been able to get a free/paid repair from vaillant??

Is it only left to roll up your sleeves and replace this supercapacitor yourself?

They probably won't replace anyone, because "this regulator does not have volatile memory support", and even more so they do not repair it (because it is integrated with the board, and they do not repair electronics)..

Judging by what's in those boilers, V. doesn't produce anything himself anymore. They put these boilers together like Vobis or ADAX PCs. It is obvious that they can replace the entire motherboard or the entire calormatic or another module, because they have no idea about repairing electronics, judging by the answers from the V service about maintaining the clock in the C470, that it does not have one. Okay, I'm closing the topic because everything is clear. And let everyone do as they please. After all, it's his equipment because he paid for it.

arigato wrote:

A beautiful read taken straight from the descriptions regarding the maintenance of the clock (timer) in VCRs. There was also the so-called supercapacitors, but they lasted more than two years. In mine - about seven. Instead, I used three ordinary 1.5V batteries, type R6 (4.5V) with one diode soldered in the reverse direction, which cured the whole device of its flaws. I applied the first treatment in 1998. Thanks to the diode, there is no question of a possible attempt to recharge the battery.
I think I helped

I just wrote about the fact that it is better to put a battery with a diode than these supercapacitors. They are kind of crap because they fall, according to my observations after 3-4 years at the latest and such a CR2032 battery will last 10 years and its replacement from the motherboard stand is 5s. So the choice is obvious.

Added after 9 [minutes]:

[quote="williams"The Calormatic has a power supply via a cable from the furnace (something around 20V I don't remember exactly) and the capacitor is in it.
Follow the topic from the beginning.
Yesterday I had no electricity for 8 hours and kept the parameters.[/quote]
I don't know what boiler you have, but in my V. ECOTEC vc 205/5-5 there is no supercapacitor on the motherboard, the data is stored in the EEPROM memory. I also do not have any additional power supply from the boiler on the EBUS bus.

Added after 12 [minutes]:

ls_77 wrote:

lukas_m wrote:

Has anyone been able to get a free/paid repair from vaillant??

Is it only left to roll up your sleeves and replace this supercapacitor yourself?

They probably won't replace anyone, because "this regulator does not have volatile memory support", and even more so they do not repair it (because it is integrated with the board, and they do not repair electronics)..

Judging by what's in those boilers, V. doesn't produce anything himself anymore. They put these boilers together like Vobis or ADAX PCs. It is obvious that they can replace the entire motherboard or the entire calormatic or another module, because they have no idea about repairing electronics, judging by the answers from the V service about maintaining the clock in the C470, that it does not have one. Okay, I'm closing the topic because everything is clear. And let everyone do as they please. After all, it's his equipment because he paid for it.

Added after 1 [minutes]:

Replacing the SR supercapacitor/battery with a CR2032 battery with a socket from the motherboard with a diode in reverse direction.