UMG 96-PA / UMG 96-PA-MID / UMG 96-PA-MID+
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18. Procedure in the event of a malfunction
Failure mode
Cause
Remedy
No display
External fuse for the supply voltage has
tripped.
Replace fuse.
No current display.
No measured voltage connected.
Connect measured voltage.
No measured current connected.
Connect measured current.
Displayed current istoo great
or too small.
Current measurement on the wrong
phase.
Check connection and correct if necessary.
Current transformer factor incorrectly
programmed.
Read and program the current transformer ratio on the
current transformer.
The peak current value at the measuring
input was exceeded by current harmon-
ics.
Install current transformers with a higher current
transformer ratio.
The current at the measuring input is too
low.
Install current transformers with a lower current trans-
former ratio.
Displayed voltage is too low or
too high.
Measurement on the wrong phase.
Check connection and correct if necessary.
Voltage transformer programmed incor-
rectly.
Read the voltage transformer ratio on the voltage
transformer and program.
Displayed voltageis too low.
Overrange.
Use a voltage transformer.
The voltage peak value at the measuring
input was exceeded due to harmonics
current.
Attention! Make sure that the measuring inputs are not
overloaded.
Phase shift, ind./cap.
Current circuit is assigned to the wrong
voltage circuit.
Check connection and correct if necessary.
Active power applied /
delivered is interchanged.
At least one current transformer connec-
tion is reversed.
Check connection and correct if necessary.
A current circuit is assigned to the wrong
voltage circuit.
Check connection and correct if necessary.
Active power too small or too
great.
The programmed current transformer
ratio is incorrect.
Read and program the current transformer ratio on the
current transformer
The current circuit is assigned to the
wrong voltage circuit.
Check connection and correct if necessary.
The programmed voltage transformer
ratio is incorrect.
Read the voltage transformer ratio on the voltage
transformer and program.
An input/output is not re-
sponding.
The input/output was programmed
incorrectly.
Check programming and correct if necessary.
The input/output was connected incor-
rectly.
Check connection and correct if necessary.
Display
"Overrange"
The measuring range has been exceed-
ed
Check connection and correct if necessary.
Correct the current/voltage
transformer ratio.
No connection to the device.
RS-485
- Incorrect device address.
- Different bus speeds
(baud rate) and / or data frames
- Incorrect protocol.
- No termination.
- Correct the device address.
- Correct the speed (baud rate).
Correct the data frame.
- Correct the protocol.
- Terminate bus with termination resistor.
Despite the above measures,
the device does not function.
Device defective.
Send the device and error description to the manufac-
turer for inspection.
