Fault Finding - Smartgen HGM9420N User Manual

22 FAULT FINDING

Symptoms
Power on but no response for the
controller
Genset shutdown
Controller emergency stop
Low oil pressure alarm after crank
disconnect
High water temperature alarm
after crank disconnect
Shutdown alarm in running
Crank disconnect failure
No response for starter
Genset is running but ATS does
not transfer.
RS485 communication
abnormal.
ECU communication failure
ECU alarm
HGM9420N_HGM9420LT Genset Controller
HGM9420N_HGM9420LT GENSET CONTROLLER USER MANUAL
Table 49 Fault Finding
Check starting batteries;
Check controller connection wirings;
Check DC fuse.
Check the water/cylinder temperature is too high or not;
Check the genset AC voltage;
Check DC fuse.
Check emergence stop button is correct or not;
Check whether the starting battery positive is connected with the
emergency stop input;
Check whether there is open circuit.
Check the oil pressure sensor and its connections.
Check the temperature sensor and its connections.
Check related switch and its connections according to the
information on LCD;
Check digital inputs.
Check fuel circuit and its connections;
Check starting batteries;
Check speed sensor and its connections;
Refer to engine manual.
Check starter connections;
Check starting batteries.
Check ATS;
Check the connections between ATS and controllers.
Check connections;
Check settings of COM port is correct or not;
is
Check RS485's A and B connections is reversely connected or not;
Check RS485 transfer model is damaged or not;
Check communication port of PC is damaged or not.
Check the polarity of CAN high and CAN low;
Check 120Ω terminal resistor is correctly connected or not;
Check engine type is correctly chosen or not;
Check communication port of PC is damaged or not.
Get information from LCD alarm page;
If there is detailed alarm information, check the engine according to
the description. If not, please refer to engine manual according to
SPN alarm code.
2019-12-10
Possible Solutions
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