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User Manual
Singular Combi Boiler - BTC 439003302 A (2021/03)
3.4.9 H8 mode
This is the mode for checking the current ambient temperature.
H8 and the current ambient temperature (example: 25) will be displayed
repeatedly on the screen.
The unit is °F.
Figure 18
3.4.10 H9 mode
This is the mode for checking the return temperature of the boiler.
H9 and the return temperature (example: 120) will be displayed
repeatedly on the screen.
The unit is °F.
Figure 19
3.4.11 HA mode
This is the mode for checking the hot water and heating modes.
HA and the heating mode or the hot water mode (example: FF or 00) will
be displayed repeatedly on the screen.
FF is the current hot water mode, and 00 is the heating mode.
Figure 20
3.4.12 HB mode
This is the mode for checking the current PCB version (example: 1.0).
HB and the PCB version will be displayed repeatedly on the screen.
Figure 21