Deif SGC 121 User Manual page 56

Start sequence flowchart
User manual 4189341354A EN
1. The controller sends a start signal to the genset.
2. The Start Delay timer is activated.
3. When the Start Delay timer expires, the pre-heating
function is activated if this is configured. If pre-heating is
not configured, go to step 7 (crank hold).
4. Pre-heating is active for the duration of the pre-heat
timer (Preheat Timer).
5. When the pre-heat timer expires, the controller activates
the ISV pull function if this is configured. If this function
is not configured, go to step 7 (crank hold).
6. The ISV pull function is active for the duration of the ISV
delay timer.
7. The controller activates the start relay output and
attempts to crank the engine. The controller starts the
crank hold timer.
8. If the crank is not disconnected when the crank hold
timer expires, the controller starts the crank rest timer.
The rest time is the time between two cranking attempts.
When the crank rest timer expires, the controller
attempts to crank the engine again (step 7).
9. If the engine does not start after the maximum cranking
attempts, the controller shows the Fail to start alarm.
10. The Safety Monitoring Delay timer starts after the crank
disconnects. The engine safety parameters are not
monitored for this duration.
11. The warm-up delay timer starts when the Safety
Monitoring Delay timer expires.
12. The genset starts when the Warm-up delay timer
expires.
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