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F9
Reason
Flame detected during normal operation, but was lost while running.
Display message
F10
Reason
Flame signal is detected while it cannot be expected.
Display message
F11
Reason
The controller does not detect a correct fan speed.
Display message
F12
Reason
Software parameters have been programmed.
Display message
F13
Reason
Fault during programming of the water heater software parameters.
Display message
F14
Reason
Gas supply pressure is too high.
Display message
F15
Reason
Rear wall thermostat (clixon) detects a too high temperature.
Display message
F16
Reason
Temperature difference T2-T1 has exceeded the blocking value.
Programmed as parameters P2 CO, P2 CR until P2 CV.
Display message
F17
Reason
Maximum thermostat (clixon) measured a too high flow temperature.
Display message
F18
Reason
Air pressure switch is activated and exceeds the fixed time period.
Or combination of NRV blocking and an F11 lock out.
Display message
F19
Reason
Pressure switch detects a high pressure in the flue/siphon system.
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