HGM1790N Genset Controller User Manual Page 23 of 31
7.5 CONDITIONS OF CRANK DISCONNECT SELECTION
Table 11 Crank Disconnect Conditions Selection
1) There are 3 conditions to make starter separate with engine; Speed, generator frequency and oil
pressure can be used separately while oil pressure is recommended to use together with speed
and generator frequency. The aim is to disconnect the starter motor as soon as possible.
2) Speed sensor is the magnetic equipment which be installed in starter for detecting flywheel
teeth.
3) When set as speed, must ensure that the number of flywheel teeth is as same as setting,
otherwise, “over speed shutdown” or “under speed shutdown” may be caused.
4) If genset without speed sensor please don’t select corresponding items, otherwise, “start fail” or
“loss speed signal” maybe caused.
5) If genset without oil pressure sensor, please don’t select corresponding items.
6) If not select generator frequency in crank disconnect setting, controller will not collect and
display the relative electric quantity (can be used in water pump set); if not select speed in crank
disconnect setting, the speed displayed in controller is calculated by generator signal.