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8.4
Troubleshooting guide
Remedies for the resolution of faults
Fault
Device is not working
Voltage or current measured values are not dis‐
played
Voltage values are not plausible
Current values are not plausible
No communication
Power values are incorrect, although voltage
and current are correctly applied
Fault indication in the display menu:
"VOID"
If the device fault cannot be remedied by the measures given above, the device is probably
defective.
More help is available on the internet. (https://www.siemens.de/lowvoltage/support-request)
PAC4220
Equipment Manual, L1V30827278B-01
Remedies
•
Check power supply
•
Check fuse
•
Check fuse
•
Check configuration
(see Parameterizing the device (Page 79))
•
If voltage transformers are available, check the settings and the connec‐
tion of the voltage transformers and correct if necessary
•
Check the settings and the wiring of the current transformer (if present)
and correct if necessary
•
Check the communication settings
(incorrect IP address, incorrect subnet, incorrect Modbus TCP port or
gateway?)
•
Check firewall, if present
(possibly preventing communication to the Modbus ports)
•
Check voltages and currents of the phases, if present
•
Check the polarity of the current transformers
(for incorrect polarity)
•
The device is defective and cannot be repaired.
Service and maintenance
8.4 Troubleshooting guide
97
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