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17 Error codes and fault nding
A detected failure is indicated on the display in blocking or error messages.
- Blocking code with spanner symbol
Error is temporary and will cancel itself or will lock the boiler after several attempts (error)
- Error code with bell symbol
Error means a lock on the boiler and can only be remedied by a reset and/or intervention by a service
technician.
10 Outside sensor error (e.g. open, short circuit, out of range)
20 Flow sensor error (e.g. open, short circuit, out of range)
40 Return sensor error (e.g. open, short circuit, out of range)
50 T3 (DHW) sensor error (e.g. open, short circuit, out of range)
61 Bus communication error (contact open)
78 Water pressure outside of range or not connected
105 Venting program active when power turned on or interrupted (runs approx. 7 mins.)
110 Safety temperature exceeded
111 Maximum temperature exceeded
117 Pressure too high (> 3 bar) or pump pressure increase too high
118 Pressure too low (0.5 - 0.8 bar) or pump pressure increase too low (no pump detection)
119 Link on X2 position 4 and 5 missing
129 Fan error (fan does not start up)
133 No ame after 5 ignition attempts
151 Fan error (speed control is not achieved or is out of range) or control unit defective
154 Flow increases too fast ∆T too large, return > ow
180 No error: shortly visible when leaving chimney sweep function
181 No error: shortly visible when leaving commissioning mode
Example of display of error message
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