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Service Manual
Singular Combi Boiler - BTC 439002301 A (12.2021)
8.13 AE Error (Blockage of Flue Pipe)
Error Description
Blockage of air inlet
Error displa
yed when air is not supplied smoothly due to foreign material in the air inlet or external factors of when the air
pressure switch is defective
Blockage of fl ue pipe
Error displayed when exhaust gas is not discharged normally due to foreign material in the fl ue pipe or external factors of
when the air pressure switch is defective
Checkpoint
Check the connection of the wire connector part.
1. Control board and wire
2. Wind pressure S/W and wire
Check the air pressure switch for abnormality.
Check if there is foreign material in the flue pipe.
Table 33
Figure 50
Check and remove foreign
material from the air inlet
and outlet
Replace the air pressure S/W
Replace the air pressure S/W
Faucet ON (4 GPM)
Air pressure S/W
contact ON when
stopping
Air pressure S/W
contact OFF when
operating
Ye s
Ye s
No
No
Replace the control board