H8 Mode; H9 Mode; Ha Mode; Hb Mode - Bosch Singular 4000 User Manual

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
Singular Combi Boiler - BTC 439003302 A (2021/03)

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
User Manual
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