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Instruction manual BFC 78
F01 (blocking error)
Defect in power supply
circuit
Live and neutral
connected wrong way
around.
Be sure to connect the live and neutral correctly (3.10 "
Electrical
connection"); the water heater is phase-sensitive
See the electrical diagram (17 "
Appendices").
Condensation on the
flame probe
1. Disconnect the lead at the flame probe
2. Ignite the water heater three times, with an interrupted
ionisation circuit
3. Reconnect the ionisation lead to the flame probe
4. Ignite the water heater again
5. The repeated ignition attempts will have caused the
condensation to evaporate
If errors persist, contact your installation engineer
Floating neutral Install an isolating transformer (3.10.4 "
Isolating transformer") Contact your installation engineer to have an isolating transformer
installed
F02 (lock out error)
Fan fails to run at
correct speed.
Defective motor and/or
rotor.
1. Check the motor and rotor
2. Replace the fan if the motor or rotor is defective.
3. Reset controller
See the electrical diagram (17 "Appendices").
To have the wiring replaced and a new fan fitted, you must contact
your installation engineer
Damaged wiring 1. Check the wiring between the fan and the controller.
2. If any wires are damaged, the wiring harness must be replaced.
3. Reset controller
Contaminated or
blocked fan
1. Check if the fan is dirty and repair it if necessary.
2. Check that the rotor can rotate freely
3. Reset controller
If the error cannot be resolved or is persistent, contact your
installation engineer
Because of a drop in
the supply voltage, the
fan will not run at the
correct speed.
1. Check the supply voltage, this must be 230 V
AC (-15%, +10%)
2. Reset controller
Code + description Cause Measure Remark
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