HGM4100LT GENSET CONTROLLER USER MANUAL
HGM4100LT Genset Controller 2019-01-28 Version1.0 Page 48 of 48
14 FAULT FINDING
Table 42 Fault and Solutions
Symptoms
Possible Solutions
Controller no response with power
Check start batteries;
Check controller connection wirings;
Check DC fuse;
Genset shutdown
Check whether water/cylinder temperature is too high or not;
Check AC genset voltage;
Check DC fuse;
Low oil pressure alarm after crank
disconnection
Check the oil pressure sensor and its connections;
High water temp. alarm after crank
disconnect
Check the 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 failure
Check fuel oil circuit and its connections;
Check start batteries;
Check speed sensor and its connections;
Refer to engine manual;
None response for starter
Check starter connections;
Check start batteries;
Genset running but none ATS
transfer
Check ATS;
Check the connection wirings between ATS and controllers;
Abnormal RS485 communication
Check connections wirings;
Check whether COM port setting is correct or not;
Check RS485’s connections between A and B is reversely
connected or not;
Check communication port on PC is damaged or not;
It is suggested to add 120
Ω resistor between RS485 A and B.
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