HGM4020DC GENSET CONTROLLER USER MANUAL
HGM4020DC Genset Controller Version 1.0 2019-04-10 Page 8 of 31
4.2 CONTROLLER PANEL
Fig.1 - HGM4020DC Front Panel Indication
NOTE: Part of indicator lights illustration:
Alarm Indicators: slowly flash when warning alarms occur; fast flash when shutdown alarms occur; light is off when no
alarms occur.
Status Indicators: Light is off when genset is standby; flash once per second during start up or shut down; always on when
in normal operation.
4.3 AUTO START/STOP OPERATION
4.3.1 ILLUSTRATION
Press , and its indicator lights up, which means controller enters Auto Start mode.
4.3.2 AUTO START SEQUENCE
a) When pre-set start conditions is satisfied, auto mode indicator flashes and meanwhile “start delay”
countdown is displayed on LCD;
b) After start delay, preheat relay outputs (if configured), and “preheat time
x s” is shown on LCD.
c) When preheat delay is over, fuel relay outputs for 1s and then start relay outputs; if engine crank fails
during cranking time, the fuel relay and start relay is deactivated and enter into “crank rest time” to wait
for next crank.
d) If engine crank fails within setting times, the fifth line of LCD turns black and “failed to start” alarm
appears on the fifth line of LCD display at the same time.
e) In case of successful crank attempt, “safe time x s” starts. During this period, low oil pressure, under
speed, charge failure alarms and auxiliary inputs (if configured) are disabled. As soon as this delay is
over, “start idle x s” is initiated (if configured).
f) In the process of “start idle speed”, under speed, under frequency, under voltage alarms are inacitve.
When this delay is over, “start warm up x s” starts (if configured).
g) When warming up is over, if generator state is normal, then its indicator will be illuminated. If generator
voltage has reached on-load requirements, the controller shall control rectifiers to output, and output
indicators shall be displayed on LCD. Generator goes into normal running state; if generator voltage is
abnormal, the controller will initiate shutdown alarm (shutdown alarm will be displayed on LCD).
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