HEM4300 Engine Controller User Manual Page 55 of 55
14
TROUBLE SHOOTING
Table 32 Troubleshooting
Symptoms
Possible Solutions
Controller no response with
power
Check starting battery;
Check controller wirings;
Check DC fuse.
Engine stop
Check water/cylinder temperature is too high;
Check AC generator voltage;
Check DC fuse.
Controller emergency stop
Check emergency stop button function is right or not;
Check emergency stop input is configured or not;
Check wire connection is open circuit or not.
Oil pressure low alarm after
crank disconnection
Check oil pressure and its wire connections.
Water temp. high alarm
after crank disconnection
Check water temperature sensor and its wire connections.
Shutdown alarm in running
Check related switch and wirings according to LCD information;
Check aux. input ports.
Crank failure
Check fuel circuit and related wirings;
Check starting battery;
Check speed sensor and its wire connections;
Refer to engine manual.
No response for starter
Check starter wire connections;
Check starting battery.
RS485 communication
abnormal
Check RS485 wire connections;
Check RS485 A and B are connected reversely or not;
Check PC communication port is damaged or not;
Check 120Ω resistor is enabled or not.
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