HMU8-860 ATS Remote Monitoring Controller User Manual Page 50 of 50
8
TROUBLESHOOTING
Table 20 – Troubleshooting
Symptoms
Possible Solutions
Monitoring module no response
for power
Check starting batteries;
Check controller connection wirings;
Check DC fuse.
RS485 comm. abnormal
Check connection wirings;
Check setting of COM port is correct or not;
Check RS485’s A and B connection is reversely connected or not;
Check whether the RS485 conversion module is damaged or not;
Check RS485 communication port is damaged or not.
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