DTSU666 series and DSSU666 series
three phase electronic energy meter
No display when
powered on
1. Incorrect wiring
2. Abnormal voltage for
the instrument
1. If it is wrongly connected,
please reconnect based on the
right wiring mode (see the
wiring diagram).
2. If the supplied voltage is
abnormal, please choose the
specified voltage.
3. If not the above problems,
please contact with the local
supplier.
Abnormal RS485
communication
1. RS485
communication cable
is opened, short
circuit or reversely
connected.
2. Address, baud rate,
data bit and check bit
is not in accordance
with the host
computer.
3. The end of RS485
communication cable
has not been matched
with resistance (when
the distance over than
150 meters)
4. Not matched with the
communication
protocol order of the
host computer
1. If there is any problem with the
communication cable, please
change it.
2. Set the address, baud rate, data
bit and check bit through
buttons and confirm it is the
same with the host computer,
then set the operation to be
“parameter settings”.
3. If the communication distance
is over than 150 meters, and the
communication parameter
settings are the same as the host
computer, but cannot be
communicated, then please
lower the baud rate or add a
resistance of 120Ω at the start
terminal and ending terminal.
Abnormal data for the
electrical parameter
(voltage, current, power,
etc.)
1. The transformer's
ratio hasn’t been set,
and the instrument
displays the
secondary side data.
1. If setting the transformer ratio,
please set the voltage ratio and
current ratio based on “parameter
setting”
2. If wrongly connected, please
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