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Error code on
display
Problem
Solution
Battery symbol
Battery output
too low
Replace batteries
F1
Valve drive
sluggish
Check installa-
tion, check the
heating valve
F2
Actuating range
too wide
Please check
the fastening
of the radiator
thermostat
F3
Adjustment
range too small
Please check
whether the valve
pin is stuck
12. Reset
The device operation: Press the „+“ and „-“ buttons
for 5 seconds to enter the reset mode, and the
screen will display “FAC”.
• Press the menu button to confirm.
• Press the boost button to exit.
After the device runs reset, the data will not be
saved,the device will automatically connect to the
gateway
13. Troubleshooting and maintenance
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