Siemens 7SR10 Argus Series Manual page 244

Section 1: Commissioning and Maintenance Guide
1.1 Troubleshooting
This section provides the common problems and the recommended solution to resolve the problem.
Observation
Relay does not power
up
Relay won't accept the
password
Protection Healthy
LED flashes
LCD screen flashes
continuously
Relay displays one
instrument after
another with no user
intervention
Cannot communicate
with the relay
Relays will not
communicate in a ring
network
Status inputs do not
work
Relay instrument
displays show small
currents or voltages
even though the
system is dead
Firmware update
Voltage and current
phase angle
measurement is not
correct in the relay
If the above troubleshooting checklist does not help in correcting the problem please contact our Customer
Support Center:
Phone: +49 180/524 7000 (24hrs)
Fax: +49 180/524 2471
E-mail: support.energy@siemens.com
© 2018 Siemens Protection Devices Limited
Action
Check the correct auxiliary AC or DC voltage is applied and the polarity is
correct.
The password entered is wrong. Enter the correct password.
If correct password has been forgotten, note down the numeric code displayed at
the Change Password screen e.g. Change password = 1234567
To retrieve the password, communicate this numeric code to a Siemens Limited
representative.
General failure. Contact a Siemens Limited representative.
The LCD displays multiple error messages by flashing continuously. These
indicate the various processor card faults.
General failure. Contact a Siemens Limited representative.
This is normal operation, the default instruments are enabled.
Remove all instruments from the default list and add only the instruments that are
required.
• Check that all the communications settings matches with the settings used by
Reydisp Evolution.
• Check that all cables, modems, and fibre-optic cables work correctly.
• Ensure that IEC 60870-5-103 is specified for the connected port (COM1 or
COM2).
• Check that all relays are powered up.
• Check that all relays have unique addresses.
• Verify the rear connection of each device as mentioned in the terminal
diagram.
• Check that the correct DC voltage is applied and that the polarity is correct.
• Check that the status input settings such as the pick-up and drop-off timers
and the status inversion function are correctly set.
This is normal. The relay is displaying calculation noise. This will not affect any
accuracy claims for the relay.
It is recommended to restart the relay once the firmware update is completed.
Refer to the 7SR10 Overcurrent relay terminal diagram.
Connect start and stop points of CT and VT as mentioned in the terminal
diagram. Start point is mentioned with dot mark in the terminal diagram.
7SR10 Commissioning and Maintenance Guide
Chapter 6 Page 3 of 3