Locking fault: To unlock Hold up and down arrow keys pressed simultaneously for 3 s. For more information see operating instr. (Boiler locked. Contact a qualified heating engineer)
Remedy
▶ Diagnose and remedy the locking fault. Check the complete system, including sensors and harnesses.
▶ When remedied and system checked, turn the boiler power off and on again.
▶ Fault condition 2981 will appear, the boiler is still in super lock-out
▶ Press the up and down arrows simultaneously for 3 seconds.
▶ Immediately after 22 seconds have elapsed, perform an additional reset by pressing the up and down arrows simultaneously for 3 seconds.
▶ Super lock-out is remedied, boiler returns to normal operating condition.
▶ Fault history is now available, double check the last 10 faults to confirm the fault has been remedied