HGM9520N Genset Paralleled Controller User Manual Page 111 of 111
18
FAULT FINDING
Table 49 Fault Finding
Symptoms
Possible Solutions
Power on but no response for the
controller
Check starting batteries;
Check controller connection wirings; Check DC fuse.
Genset shutdown
Check the water/cylinder temperature is too high or not;
Check the genset AC voltage; Check DC fuse.
Controller emergency stop
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.
Low oil pressure alarm after
crank disconnect
Check the oil pressure sensor and its connections.
High water temperature alarm
after crank disconnect
Check the water temperature sensor and its connections.
Shutdown alarm in running
Check related switch and its connections according to the
information on LCD;
Check programmable inputs.
Crank disconnect failure
Check fuel circuit and its connections;
Check starting batteries;
Check speed sensor and its connections;
Refer to engine manual.
No response for starter
Check starter connections;
Check starting batteries.
Genset is running but ATS does
not transfer.
Check ATS;
Check the connections between ATS and controllers.
RS485
communication
is
abnormal.
Check connections;
Check settings of COM port is correct or not;
Check RS485’s A and B connections is reversely connected or not;
Check RS485 transfer module is damaged or not;
Check communication port of PC is damaged or not.
ECU communication failure
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 the connection between controller and engine is correct or
not; Check output port setting is right or not.
ECU alarm
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.
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