Help needed! Fjärrvärme not working

[Norman.]

Hello,

I'm posting here in hopes of getting some helps. We live in a Rådhus that utilizes a Fjärrvärme system (picture 1). In previous years, this system has always worked perfectly fine. However, with the recent drop in temperature, I've noticed that both the upstairs radiators and the downstairs underfloor heating are not functioning, despite having all the valves turned to the maximum.

I've had friends come over to take a look, and we found that the maintenance indicator on the control panel of the remote heating center is blinking (picture 2). Additionally, there is no light on the black device of the central system (picture 3). Under normal circumstances, it should display and allow for the control of power levels (picture 4).

Could any experts please take a look and advise on possible solutions, or recommend a reputable repair company? I greatly appreciate any helps in advance.

Thank you!

 

[paralun]

Hello Norman

Alfa Laval also uses equipment from Honeywell and this is the nearest I found.

https://www.cetetherm.com/download/...3394/1620658680594/Mini Plus H737 2021-05.pdf

If you take a look in chapter 10, Troubleshooting

As you can see the tool symbol means a communication error. (don't contact cetetherm)

Contact your heating company and ask for help.

 

[Norman.]

Hello Norman

Alfa Laval also uses equipment from Honeywell and this is the nearest I found.

[länk] Plus H737 2021-05.pdf

If you take a look in chapter 10, Troubleshooting

As you can see the tool symbol means a communication error. (don't contact cetetherm)

Contact your heating company and ask for help.

Thanks a lot! I will take a read of the link you sent.
Have a lovely weekend

 

[paralun]

Thanks a lot! I will take a read of the link you sent.
Have a lovely weekend

Well, this manual was the nearest I found in english.
Your heating company knows exactly.

It can be easy to solve, check the cable and connections between the display unit and control unit.

 

[Norman.]

Well, this manual was the nearest I found in english.
Your heating company knows exactly.

It can be easy to solve, check the cable and connections between the display unit and control unit.

yes, I think it must be some cabling issue.. there is one gauget in the system has no indicator lamp. and my neighbor's has power light (2nd picture)..

 

[paralun]

yes, I think it must be some cabling issue.. there is one gauget in the system has no indicator lamp. and my neighbor's has power light (2nd picture)..

Maybe, open and close the connector but maybe also to disconnect the whole unit before you do that.