APC615 Pump Unit Controller User Manual
APC615 Pump Unit Controller Version 1.0 2017-10-20 Page 53 of 54
14 TROUBLESHOOTING
Table 46 – Fault Finding
Controller no response with
power.
Check starting batteries;
Check controller connection wirings;
Check DC fuse.
Check the water/cylinder temperature is too high or not;
Check DC fuse.
Controller emergency stop
Check emergence stop button is correct or not;
Check whether the circuit is open.
Low oil pressure alarm after
crank disconnect
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.
Check fuel oil circuit and its connections;
Check starting batteries;
Check speed sensor and its connections;
Refer to engine manual.
Check starter connections;
Check starting batteries.
Check connections;
Check setting of COM port is correct or not;
Check RS485’s connections of A and B is reverse connect or not;
Check RS485 transfer model whether damage or not;
Check communication port of PC whether damage.
Check connections of CAN high and low polarity;
Check if correctly connected of 120Ω resister;
Check if engine type is correct;
Check if connections from controller to engine and outputs setting are
correct.
Get information from LCD of alarm page;
If there is detailed alarm, check engine according to description. If not,
please refer to engine manual according to SPN alarm code.