Manual
HM1016ER1
Control and Operation Instruction
Harsen
®
Page 8/54
NOTE:
Above control procedure, assumes that one of configurable inputs has
been configured as Mains Aux. Switch Closed and connects the
switch’s N.O. Aux. contact to this port. If you do not configure an input as
Mains Aux. Switch Closed, then the MCB closed LED illuminates is only
an indication that the MCB close/open relay should have been closed,
under this condition, the alarm for Mains fail to load is inactive, and the
along function of start Genset is also inactive.
Generator Auto Start Sequence:
Controller implements following procedure when Mains voltage failure occurs (it means that the
controller detecting either the voltage or the frequency of Mains is over the range of preset values and
delay confirmed), or Mains fail to load, or remote start signal is active and Mains failure;
NOTE:
To achieve remote start, one of configurable inputs must be defined as
remote start signal.
The Start delay timer is activated, when it times out, the Preheat relay output is energised (if preheat
function selected), the timer starts. When it times out, the fuel relay output is energised, and operates
the fuel solenoid of the engine. After 300ms delay, the start relay output is energised, the start motor
engages and begins to crank. When the engine speed reaches the crank cutout RPM, the start relay
output is de-energised and the safety-on delay starts. When the safety-on times out, if the controller
detects that the parameters of the Genset such as voltage, frequency, oil pressure, coolant temperature
are normal, and no other failure is detected this indicates the Genset has successfully started and
running normally. The LCD displays the Genset Measurement Parameters.
When Generator is running normally, Gen. Normal LED illuminates, the timer for GEN. ON delay is
activated, when it times out, GCB close/open relay closes, the transfer switch switches on Gen. The
Gen Aux. Switch’s contact feeds back a signal to a configurable input on the controller. GCB closed
LED illuminates.
NOTE:
If Mains fails to load, the start sequence is initiated without the start-delay
timer.
When Mains voltage failure and remote signal is active, the start-delay
timer is activated, if remote start signal is inactive or Mains voltage
resumes to normal during this period, the start delay timer terminates
immediately, the controller terminates the starting procedure, and then
recovers to the original standby status.
During cranking or idle period, if the remote start signal is inactive or
Mains voltage resumes to normal, the controller stops the start procedure,
then recovers to the original standby status.
Under any conditions, GEN. ON delay only can be started after Safety-on
Delay times out.
