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Code and description
F11 (blocking error)
Flame detection with
closed gas control valve.
F19 (blocking error)
Power supply voltage is
too low.
C02 (lock out error)
Error message from the
controller.
Internal error message
from the controller.
Internal error message
from the controller.
C03 (blocking error)
Reset error
C04 (blocking error)
Appliance selection error
E01 (blocking error)
The temperature
protection at the top of
the tank has been
activated.
E03 (lock-out error)
Error in temperature
sensor T
at the top of the
1
tank.
E04 (lock-out error)
Defect in the dummy
sensor
.
(2)
0311704_BFC_28-120_III_ENEN_V2.4, 2022-10-17
Cause
Defective gas control valves
There is not enough supply voltage.
Incorrect reference voltage from the AD
converter.
•
EEPROM read error
•
50 Hz error
•
Internal communication error
•
Gas valve relay error
•
Safety relay error
•
Ignition relay error
•
RAM error
•
EEPROM error
•
EEPROM contents do not match the
software version
•
Processor software error
Too many resets in too short a period
Incorrect water heater selection /
Incorrect selection resistor
The temperature of the water at the top
of the tank is > 88 ºC.
The two temperature sensors in the tank
detect a difference of > 10°C over a
period of at least 60 seconds.
The two temperature sensors detect a
difference of >10 ºC over a period of at
least 60 seconds.
Measure
See F07.
1.
Check that there is power to the
controller
2.
The measured voltage must be 230 VAC
(-15%, +10%)
1.
Reset controller.
2.
Check that the frequency of the power
supply is compliant (see section 12.1). If
not, contact your installation engineer
3.
If the frequency is correct but the error
persists, replace the controller.
Wait for the error to disappear (maximum 1
hour). If the error does not disappear,
replace the water heater controller.
1.
Check whether the correct water heater
is selected (see section 12.1).
2.
If the correct water heater is selected, fit
the correct selection resistor.
3.
If incorrect water heater selected, select
the correct one.
None. This is a temporary message that
may appear from time to time, but will
disappear automatically.
1.
Check sensor position and wiring.
2.
Reset the controller if necessary. Replace
the sensor if the error persists.
1.
Check the wiring of the dummy 1 and
dummy 2.
2.
Reset the controller if necessary. Replace
the dummy sensor if the error persists.
95
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