HMC6 Power Management Controller User Manual
Page 87 of 87
CAUTION!
When controller had been installed in control panel, if need the high voltage test, please
disconnect controller’s all terminal connections, in order to prevent high voltage into controller and damage
it.
14
FAULT FINDING
Table 37 – Fault Finding
Symptoms
Possible Solutions
Controller no response with
power.
Check starting batteries;
Check controller connection wirings;
Check DC fuse.
Controller adjust speed/voltage
relay no response
Check whether or not GOV, AVR output select as internal relay output.
Controller GOV, AVR output
error
Check setting of Central point SW1 and range SW2;
Check whether or not GOV, AVR output select as internal analog output.
Impact current is too large
while synch closing
Single unit breaker switch back
and forth
Adjust load controlling parameters;
Debug every single unit based on the commissioning process.
Paralleling units cannot raise
power or drop power, or just
can little raise/drop power
When the internal analog speed control, set SW1 wrong, or adjust the speed
control board;
When the internal relay speed control, check whether the potentiometer is in
the middle position.
Shutdown alarm in running
Check related switch and its connections according to the information on
LCD;
Genset is running while switch
is not operating
Check if the output signal of the controller is matched with switch signal;
Check the connections between switch and controllers.
MSC modules too few
Check MSC LINK communications.
Detect if the MSC LINK communication is normal.
RS485
communication
is
abnormal
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.
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