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8 Troubleshooting
This chapter gives the basic troubleshooting methods for customer as a
reference.
8.1 Before troubleshooting
Please notice the following items before troubleshooting:
Disconnect the DC switch before operation.
Please do not touch the bare metal parts of the copper bar under the
protection plate.
Pull the fuse holder for maintenance of the combining busbar and to
disconnect the input cable.
High voltage still exists after DC switch is switched off.
The fuse holders are still live after fuses are removed.
8.2 Common faults and troubleshooting
Fault
Possible cause
Method of correction
On the monitoring
unit, neither
“RX” nor
“TX” lights up.
RS485
communication fault
Check communication line.
Refer to
”.
On the monitoring
unit,
“RX” flashes and
“TX” does not light
up.
Incorrect address
Refer to "5.5 Communication
settings"
Summary of Contents for PVS-12MH-DB
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