HGM8110A/8120A Genset Controller User Manual Page 18 of 57
4.4
AUTOMATIC START/STOP OPERATION
Press
, its indicator lights, and controller enters
Auto
mode.
Starting Sequence,
1.
HGM8120A
: When Mains is abnormal (over and under voltage, over and under frequency), it enters
into mains “abnormal delay” and VFD displays count down time. When mains abnormal delay is
over, it enters into “start delay”;
2.
HGM8110A:
Generator enters into “start delay” as soon as “Remote Start” is active;
3.
“Start delay” timer is shown on VFD display;
4.
When start delay is over, preheat relay outputs (if this be configured), “preheat delay XX s” is shown
on VFD;
5.
When preheat delay is over, fuel relay outputs 1s and then start relay output; if engine crank fails
during “cranking time”, the fuel relay and start relay deactivated and enter into “crank rest time” to
wait for next crank;
6.
If engine crank fails within setting times, the controller sends “Fail to start” signal and “Fail to start”
message appears on VFD alarm page;
7.
In case of successful crank attempt, “safety on” timer starts. During this period, low oil pressure,
high water temperature, under speed, charge failure alarms and Aux. input (if configured) are
disabled. 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” starts (if configured);
9.
When “warming up delay” is over, if generator state is normal, its indicator will be illuminated. If
voltage and frequency have reached on-load requirements, the closing relay will be energized,
generator will accept load, generator power indicator will turn on, and generator will enter Normal
Running state; if voltage and frequency are abnormal, the controller will initiate alarm (alarm type
will be displayed on VFD).
NOTE: HGM8110A:
In case of “Remote Start (off Load)”, the procedure is the same, except for step No. 9: generator
close relay will NOT be energized, genset will NOT accept load.
Stopping Sequence
1)
HGM8120A:
If mains turns normal during genset is running, it enters into mains voltage “normal
delay” and its indicator illuminates after mains is confirmed normally, “stop
delay” is beginning;
2)
HGM8110A:
Genset enters into “stop delay” as soon as “Remote Start” input is inactive;
3)
HGM8120A:
After stop delay ends, it enters “cooling time”, and generator close relay is
disconnected, after “switch transfer delay”, mains close relay output, mains is on-load, generator
