Running Modes; Auto Mode - Deif SGC 120 User Manual

7. Running modes

7.1 Auto mode

Select Auto mode with the Mode selection
• Automatic Mains Failure (AMF)
• Remote start/stop
• Exercise mode
Automatic Mains Failure (AMF) mode
DG OFF
Mains unhealthy
Warm up
Warm up delay expired
DG ON
Mains healthy
Return to
Mains
Return to Mains delay expired
Engine
cooling
AMF mode is activated when Exercise mode is disabled, and Mains monitoring is enabled.
If the mains is healthy, the genset remains in Stop mode. If the mains is unhealthy for longer than the Mains detect delay time, the
controller sends a Start command and the genset starts according to the Start sequence. When the genset loading voltage and
frequency are above the Minimum healthy thresholds, the Warm-up delay timer starts. At the end of the Warm-up delay, the Load
transfer delay starts and the genset latches.. Engine running hours increase while the genset runs. The running hours stop
increasing when a Stop command is received. During genset running mode, if the mains is found healthy, the Return to mains delay
timer starts. If the mains is found unhealthy during the Return to mains delay, the genset continues to run. At the end of the Return
to mains delay, if mains is still healthy, the genset contactor opens and the mains contactor latches after the Load transfer delay.
After opening the genset contactor, Engine cooling time starts. At the end of Engine cooling time, the controller initiates the Stop
sequence by giving the Stop command.
If the mains voltage recovers or any stop command or shutdown alarm occurs during the Crank time, the controller will not send a
start command. To start the genset again, all the alarms must be cleared manually.
USER MANUAL 4189341226A UK
button. In Auto mode the controller can be used in following configurations:
Engine
cooling
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