Spheros Thermo 230 Notice De Montage page 68

Troubleshooting
13.2. Fault code output on heaters with control module 1572D
If the system is equipped with a standard timer, a fault message appears
on the display of the timer after a fault occurs.
NOTE:
If the system is operated with a switch, the nature of the fault is indicated
by a flashing code on an indicator light during the run-on time of the
heater. After five short signals, count the long flashes. The flashes
correspond to the number in the table below:
F 01 No start
F 02 Flame failure
F 03 Undervoltage or overvoltage
F 04 Flame simulation identified during start-up or shut-down
F 05 Flame detector defective
F 06 Temperature sensor defective
F 07 Solenoid valve defective
F 08 Blower motor defective
F 09 Defective circulation pump
F 10 Temperature limiter defective / Overheating
F 11 Ignition spark generator defective
F 12 Fault lock-out due to repeated malfunction or repeated flame
failure
(8x no start-up or 5x flame failure)
13.2.1. To reset the heater after a fault lock-out
To reset the heater after a fault lock-out, switch on the heater and cut the
power supply to it during the starting process.
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Thermo 230/300/350