Bosch Singular 4000 - H0 Mode; H1 Mode; H2 Mode; H3 Mode

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Installation Instructions
Singular Combi Boiler - BTC 439003301 B (2021/07)
10.5.1 H0 mode
 This is the mode for checking the previous error.
 H0 and the previous error (example: A6) will be displayed repeatedly on
the screen.
Figure 54
10.5.2 H1 mode
 This is the mode for checking the most recent error.
 H1 and the most recent error (Example : A2) will be displayed repeatedly
on the screen.
Figure 55
10.5.3 H2 mode
 This is the mode for checking the current error.
 H2 and the current error (Example : A3) will be displayed repeatedly on
the screen.
Figure 56
10.5.4 H3 mode
 This is the mode for checking the current pressure in the system.
 H3 and the current pressure in the boiler (Example : 25) will be displayed
repeatedly on the screen.
 The pressure unit is PSI.
Figure 57