Control, Starting And Stopping Sequences - MTU 20 V 4000 L63 Operating Instructions Manual

4.3 Control, starting and stopping sequences

Starting and stopping sequences
The start sequence is software-controlled and depends on the place of start command input.
To ensure that no mixture is in the engine when ignition is switched on or off, which is a specific require‐
ment for gas engines, special procedures for engine start / stop are specified.
Start sequence
If a start command is activated with the engine being at standstill, the following steps are carried out au‐
tomatically:
1. (Optional) Prelubricating until the desired oil pressure is reached
2. Checking gas supply solenoid valves for leaks
3. Activating starter
4. Waiting for starting speed
5. Flushing the engine
6. Ignition
7. Opening gas supply solenoid valves
8. Waiting for starter disengagement speed
9. Disengaging starter
10. Waiting for idling speed
11. Runup to rated speed
Stop sequence
If a stop command is activated, the following steps are carried out automatically:
1. Closing gas supply solenoid valves
2. Coasting down engine to standstill or for a maximum coasting period
3. Deactivating ignition
Emergency stop sequence
If an emergency stop command is activated, the following steps are carried out automatically:
1. Closing gas supply solenoid valves and mixture throttles
2. Coasting down engine to standstill for a maximum coasting period
3. Deactivating ignition
Oil refill sequence
1. Waiting for engine running
2. Engine running for a minimum (parameterized) time period
3. Oil refilling enabled
4. When oil refill request is received
5. Refilling oil (automatically)
6. When oil refill request is canceled
7. Stopping oil refilling (automatically)
MS150059/01E 2012-07 | Operation | 39