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Plumberpro
Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
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My heating system is controlled by a Danfoss TS715Si Timeswitch

Customer Question

Hi, my heating system is controlled by a Danfoss TS715Si Timeswitch which recently began to default to factory settings every day.
I tried the full reset as the instructions but to no avail so I bought a replacement timeswitch which I have fitted but the problem remains, even after resetting this one too.
Do you have any advice ?
Thanks, Doug
Submitted: 2 years ago.
Category: Appliance
Expert:  Plumberpro replied 2 years ago.
Hi , that is really odd, I wonder if there is a manufacturing fault. Is it within years warranty ?
Customer: replied 2 years ago.
The replacement is brand new, but it can't be a coincidence that the original one which has worked for 6 years and the new one have the same problem.
Maybe I'm doing something wrong on the reset but I'm following instructions on the manual.
Expert:  Plumberpro replied 2 years ago.
Hi , can you unmount the unit from the wiring back plate and check the dip switches? They are small black switches .they are for setting if you want 7 or 5 day 2 off .if you want the same every day or different at weekends.
Customer: replied 2 years ago.
Both the original and replacement units have the DIL switches as per the instructions - 1,2 and 4 down and 3 up
Expert:  Plumberpro replied 2 years ago.
OK
So you reset and how far did you get programming the days and times?
Customer: replied 2 years ago.
It accepts all the new times and seems all is well but the next day it has reverted to default settings
Expert:  Plumberpro replied 2 years ago.
After you enter the times and temperatures, you then press the prog button to run?
Customer: replied 2 years ago.
Yes and it works fine using the revised on/off times until the next day
Expert:  Plumberpro replied 2 years ago.
Hi , its got to be a manufacturing fault. Give me 10 mins , thanks
Customer: replied 2 years ago.
I have little confidence that you will come up with a solution so will not be paying anything further - if you do solve the problem then I will make additional payment.
Expert:  Plumberpro replied 2 years ago.
Hi , I phoned Danfoss technical, there are no reported manufacturing faults they are aware of .you must be doing something wrong in the process.
However I have the instructions in front of me too as do you , and I really would be repeating what you are reading unless we were to through it together , but its very hard like this as it takes a long time . do you want to talk overcthgev phone?