103
Display message
F10
F a l s e
f l a m e s i g n a l
p u m p o n
9 9 9 , 5 h r s
Reason
Flame signal detected, while water heater should not fire
for operation.
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
F a n s p e e d
i n c o r r e c t
p u m p o n
9 9 9 , 5 h r s
Reason
Actual fan speed differs from the unit rpm set point.
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.
Display message
F12
p r o g r a m m i n g e n d
p u m p o n
9 9 9 , 5 h r s
Reason
Programming of the parameters completed successfully.
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
P a r a m / H a r d w f a u l t
p u m p o n
9 9 9 , 5 h r s
Reason
Failure during programming of the parameters.
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.
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