Fault Messages - REMEHA Timer thermostat User Manual

7.1 Fault messages

F200: No connection to outside sensor
Fault indication
Display text
Solution
F203: Faulty connection to boiler
Fault indication
Display text
Solution
Fault code F200
c and Z are lit up.
No connection to outside sensor.
Check the boiler's connection to the outside temperature sensor.
Fault code F203
c is lite up
Communication fault. Check the connection.
Check the connection to the boiler.
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