Figure 9.8.ii Pre-ignition
The ignition transformer output is switched on in the Pre-ignition phase shown in Figure 7.8.ii, before the pilot gas
valve is switched on (open). See option/parameter 113.
If no voltage is detected when the ignition output T63 should be on (and vice versa), the lockout ‘Ignition Output
Fault’ will occur.
If the gas valves proof of closure switch output T55 is opened during ignition, the lockout ‘CPI Input Wrong State’ will
occur.