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5
Troubleshooting
Fault phenomenon
No display after the
instrument being
powered on
Abnormal RS485
communication
Power metering
inaccuracy
6
Verifying the Installation
1. Check that all mounting brackets are securely installed and all screws are tightened.
2. Check that all cables are reliably connected with correct polarity and no short circuit.
7
Powering On the System
For details, see the other description.
Factor analysis
1. Incorrect wiring mode;
2. Abnormal voltage supplied for
the instrument;
1. The RS485 communication
cable is disconnected, short
circuit or reversely connected.
2. The address, baud rate, data
bit and parity bit of the
instrument is not in accordance
with the host computer;
1. Wrong wiring, please check
whether the corresponding
phase sequence of voltage
and current is correct.
2. Check whether the high & low
end of current transformer inlet
is reversely connected. Please
observe the power, to be
abnormal if any negative
values.
Elimination method
1. If the wiring mode is incorrect,
please connect based on the
correct wiring mode (see the
wiring diagram).
2. If the supplied voltage is
abnormal, please supply the
voltage on the instrument
specification.
1. If any problems for the
communication cable, please
change the cable.
2. Set the address, baud rate,
data bit and parity bit of the
instrument to be the same as
the host computer through
buttons and so as the
"parameter setting".
For wrong wiring, please connect
based on the correct wiring mode
(see Connecting Diagram).
6
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