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Display message
F10
Reason
Cause:
The flame detection circuit detects a flame which is not supposed to be present.
Corrective action:
Check the ignition/ionisation electrode and make sure it is clean (or replace it).
Check the power supply voltage for a correct polarity.
Check the power supply for bad frequency or voltage peaks.
Check external wiring for voltage feedback.
Check the internal wiring for bad connections.
Check if the gas valve is closing correctly.
Replace the main control board (PCB).
Display message
F11
Reason
Cause:
An incorrect fan speed is detected.
Corrective action:
Check the 4 wired wiring and connections at the fan and at the main control board.
Check the 3 wired power supply wiring and connections at both ends.
Replace the fan.
Replace the main control board.
Cause:
The fan of the non-burning burner is not able to run, to prevent recirculation.
Check the 4 wired wiring and connections at the fan and at the main control board.
Check the 3 wired power supply wiring and connections at both ends.
Replace the fan.
Replace the main control board of that specific burner.
`
Display message
F12
Reason
Cause:
Programming of the parameters completed successfully.
Corrective action:
This message occurs to confirm the end of programming. Pressing RESET will return the unit in normal
operating status.
Display message
F13
Reason
Cause:
Programming of the parameters NOT successfully completed.
Corrective action:
Unit is not in stand-by mode (fan must not run during programming).
Check programming wire and connections and try again.
Check if the software complies with the PCB.
Replace the programming wire.
Replace the display PCB.
F
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Flame signal detected, while water heater should not fire
for operation.
F
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Actual fan speed differs from the unit rpm set point.
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Programming of the parameters completed successfully.
P
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Failure during programming of the parameters.
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9
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5
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5
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5
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105
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