Start And Stop Sequences - Deif SGC 420 User Manual

Acknowledge and clear alarms
NOTE If Engine ON is detected without any start command is given to the controller, the engine will remain ON. Other actions will
be according to operating mode and configuration.

7.3 Start and stop sequences

Start sequence
Start
Start wait
Pre-heat
configured
No
Yes
Pre-heating
Crank hold
Crank rest
Engine ON
End
USER MANUAL 4189341227A UK
Shutdown Alarm
Warning Alarm
Notification
Fail to
start
• Press the Acknowledge
the alarm in any mode.
When the controller receives the Start command, it goes to the
Start wait state.
After the Start delay (Manual or Auto start delay) has expired,
the controller will:
• If Pre-heating is not configured, the controller goes to Crank
hold state and activate the Start relay output.
• If Pre-heating is configured, the controller goes to the Pre-
heating state. When the Pre-heating time is over or the Pre-
heating temperature threshold is reached, the controller goes
to the Crank hold state.
If the Crank is not disconnected and the Crank hold time has
expired, the controller goes to the Crank rest state.
If the Crank is not disconnected and Crank rest time has
expired, the controller goes to the Crank hold state for the next
cranking attempt.
If the Crank is disconnected in the Crank hold or Crank rest
states, the controller goes to the Engine ON state.
If the maximum cranking attempts are done, the controller
shows the Fail to start alarm.
button to acknowledge
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