Manual
HM1016ER1
Control and Operation Instruction
Harsen
®
Page 14/54
4.8 The function of forcing start
Reason to add this function to the controller is that when the engine under abnormal conditions, e.g. the
battery voltage is too low or ambient temperature is too low, or generator only outputs voltage at a high
speed when magnetic pick-up is not used, the Genset cannot be started successfully when it
implements the build-up cranking process of controller. There are 2 methods to solve these conditions
in the controller:
First method: when controller is running in “MANUAL” mode, normally the crank time will not exceed the
pre-set value, but you can press “START” button and hold without changing the related parameters until
it has started, the crank time depends on the holding time on the button. Safety-on timer begins after it
has successfully started. The other processes and protections are the same as for a normal start.
Second method: when controller is running in “MANUAL” mode, configure the “EX. Crank permit” as
“1”, shown as schematic below, a PB switch is externally mounted to control cranking. Close PB switch,
engine cranks, when the speed reaches 150RPM or generator voltage output is not less than AC 20V if
magnetic pick-up is not used, then controller functions are triggered, the fuel relay output is energised,
safety-on timer begins after the speed reaches crank cutout value, the other processes and protections
are the same as normal start. If the speed falls below 150RPM within safety-on time, controller will be
reset and return to standby status.
CAUTION:
We normally don’t recommend using the second method to solve this
condition.
Pay attention to the installation of PB switch to avoid cranking when the Genset
is running.
