APC715 Pump Unit Controller
APC715 Pump Unit Controller ISSUE 2013-08-28 Version 1.0 Page 62 of 62
14 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 positive of starting battery is
connected with the emergency stop input;
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.