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Service Manual
Singular Combi Boiler - BTC 439002301 A (12.2021)
AD Error - Wire Check
1. Check the connection of the condensation trap and the wire.
2. Check wire condition for any damage or short circuit.
Figure 48 Control Board
Figure 49 Condensation Trap Wire
AD Error - Foreign Material Check
1. Check if the condensation trap is clogged.
2. Separate the condensation trap and wash it with running water.
— After washing the condensation trap, fill the condensation trap with
water up to 2/3.
AD Error - Freezing Burst Check
1. Check if the condensation water is frozen in the condensation hose.
2. Melt the frozen condensation water with a tool if frozen.
AD Error - Control Board Check
1. The condensation trap is not clogged and the condensation water is
discharged normally, replace the control board.
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