0BChapter 4
Troubleshooting
4-6
Troubleshooting
When
Phenomenon
Items to be checked
Action to be taken
Reference page
The primary current of
the inverter cannot be
measured correctly.
Check that the
selected dedicated CT
has some margin in
the standard.
When the primary current of inverter is measured,
the crest value is several times larger than the
effective value. Therefore, use a dedicated CT
having some margin in the standard.
A-7
The date and time of
the clock are initialized
to April 1, 2012 at
0:0:0.
Check whether the
RTC backup period
has passed.
Set the clock all over again.
-
Check that the
specified connector
has been used.
Use the specified connector.
2-7
Check that the settings
of the connection
configuration are
correct.
Match the setting of the slave ID of the connected
unit with that of the connection configuration of the
measurement master.
2-3
Communication with
the unit connected
cannot be carried out.
Check that the power
voltage has been
applied to the
functional slave.
Power voltage can be applied from the
measurement master to CT expansion slaves only.
Apply power voltage to the functional slave.
-
Data backed up every
5 minutes or alarm
histories for CTD8E
(CT expansion) are
not saved.
Check for errors in
connections.
Connecting units to each other via the connector,
match the setting of the slave ID with that of the
connection configuration of the measurement
master.
-
When
used
Although
communication with
the unit connected can
be carried out, CONN
remains OFF.
-
Reset the entire system.
-
