Bosch ZSB 30-2 Installation And Servicing Instructions page 69

Display
code Description
FA A flame is detected after the gas has been
switched off.
Fd Reset was pressed in error.
Table 27 Faults shown on the display
Remedy
B Check gas valve; replace if required.
B Clean condensate trap.
B Check electrodes and lead; replace if required.
B Check flue gas system; clean or repair if required.
B Press reset again.
B Check cable harness to high limit safety cut-out and gas
valve for earth connection.
Fault mode | 69
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