Appendix
0020224355_00 HOME Installation and maintenance instructions
37
Fault code
Meaning
Possible cause
F.83
Fault: Burner temperature sensor
Burner temperature sensor is defective
When the burner starts, the temperature change recorded by the flow or
return temperature sensor is non-existent or too small: Insufficient water in
the product, flow or return temperature sensor incorrectly attached to the
pipe
F.84
Fault: Flow/return temperature sensor
Values not consistent, difference < -6 K
Flow and return temperature sensors signalling implausible values: Flow and
return temperature sensors have been inverted, flow and return temperature
sensors have not been correctly installed
F.85
Fault: Temperature sensor
The flow and/or return temperature sensors have been installed on the same
pipe/incorrect pipe
Temperature sensor not connected or is connected incorrectly
F.86
Fault: Underfloor heating contact
Underfloor heating contact open, sensor disconnected or defective
F.87
Fault: Ignition electrode
Ignition electrode not connected or not connected properly, short circuit in
the cable harness
F.88
Fault: Gas valve
Gas valve not connected or it is connected incorrectly, short circuit in the
cable harness
F.89
Fault: Pump
Pump not connected or it is connected incorrectly, incorrect pump connec-
ted, short circuit in the cable harness
Summary of Contents for home combi
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