ACC4100 Diesel Air Compressor Controller User Manual Page 51 of 52
15
TROUBLE SHOOTING
Table 45 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 DC fuse.
Controller emergency stop
Check emergency stop button function is right 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 programmable input ports.
Crank failure
Check fuel circuit and related wirings;
Check starting battery;
Check speed sensor and its wire connections;
Refer to engine manual.
None response for starter
Check starter wire connections;
Check starting battery.
RS485 communication is
abnormal
Check RS485 wire connections;
Check RS485 COM port settings are correct or not;
Check RS485 A and B are connected reversely or not;
Check RS485 conversion module is damaged or not;
Check PC communication port is damaged or not.
ECU communication failure
Check wire CAN high and CAN low polarity;
Check 120Ω resistor is connected correctly or not;
Check engine type is selected right or not;
Check wire connection between controller and engine is right or not;
output port settings are right or not.
ECU warning or shutdown
Refer to alarm screen to obtain information;
If there is detailed alarm information, then check engine according to it;
If there is not, refer to engine manual to obtain information according to
SPN alarm code.
