HGM93XX MPU(CAN) SERIES GENSET CONTROLLER
HGM93XX MPU(CAN) Series Genset Controller Version: 1.1 2016-11-03 Page 22 of 77
5.4 AUTO START/STOP OPERATION
Auto mode is selected by pressing the
button; a LED besides the button will
illuminate to confirm the operation.
Automatic Start Sequence:
1. HGM9320MPU(CAN): When Mains is abnormal (over and under voltage, over and under
frequency, loss of phase, phase sequence wrong), it enters into mains “abnormal delay”
and LCD display count down time. When mains abnormal delay is over, it enters into
“start delay”; it also enters into this mode when “remote start on load” is active.
2. HGM9310MPU(CAN): When “Remote Start (on load)” is active, “Start Delay” timer is
initiated;
3. “Start Delay” countdown will be displayed on LCD;
4. When start delay is over, preheat relay energizes (if configured), “preheat delay XX s”
information will be displayed on LCD;
5. After the above delay, the Fuel Relay (if configured) is energized, and then one second
later, the Start Relay is engaged. The engine is cranked for a pre-set time. If the engine
fails to fire during this cranking attempt then the fuel relay and start relay are disengaged
for the pre-set rest period; “crank rest time” begins and wait for the next crank attempt.
6. Should this start sequence continue beyond the set number of attempts, the start
sequence will be terminated, the first line of LCD display will be highlighted with black and
Fail to Start fault will be displayed.
7. In case of successful crank attempt, the “Safety On” timer is activated, allowing Low Oil
Pressure, High Temperature, Under speed and Charge Alternator Failure inputs to
stabilise without triggering the fault. As soon as this delay is over, “start idle” delay is
initiated (if configured).
8. During “start idle” delay, under speed, under frequency, under voltage alarms are inhibited.
When this delay is over, “warming up” delay is initiated (if configured).
9. After the “warming up” delay has expired, if generator status is normal, its indicator will be
illuminated. If generator voltage and frequency have reached on-load requirements, then
the generator close relay will be energized; genset will take load; generator power indicator
will illuminate and generator will enter into Normal Running status. If voltage or frequency
is abnormal, the controller will initiate shutdown alarm (alarm information will be displayed
on LCD).
Note:
When started via “Remote Start (off Load)” input, same procedures as above but
generator close relay deactivated, moreover, genset off load in NO.9 item.
