Siemens 7SR45 Argus User Manual page 109

Section 1: Commissioning and Maintenance Guide
1.1 Troubleshooting
This section provides the common problems of 7SR450x Relay and the recommended solution to resolve the
problem.
Observation
Relays will not
communicate in a ring
network
Relay does not power
up
Relay won't accept the
password
Protection Healthy and
Trip Ready LED
OFF/LCD not displaying
Cannot communicate
with the relay and
Reydisp evolution
Binary inputs do not
work
Low/Critical battery
Indication
If the above troubleshooting checklist does not help in correcting the problem please contact the local Siemens
office or contact customer support:
Phone: +49 180/524 7000 (24hrs)
Fax: +49 180/524 2471
E-mail: support.energy@siemens.com
© 2018 Siemens Protection Devices Limited
Chapter 6 - 7SR45 Commissioning and Maintenance Guide
Action
• Check that all relays are powered up with auxiliary power supply.
• Check the polarity of rear communication terminal and connection.
• Check that all relays have unique addresses.
• Check the correct auxiliary AC or DC voltage is applied and the
polarity is correct (or)
• Check the phase connections based on the terminal diagram and if
CT power is applied (or)
• Check USB port if the relay is connected with USB power (or)
• Check the battery healthy voltage if the relay is powered with battery
power.
• 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.
• To retrieve the password, communicate this numeric code to a
Siemens Customer representative.
1. In the absence of auxiliary voltage, check the minimum phase
currents.
2. Check the error messages and the error codes in the Instrument
Mode.
• Check the communication cable is connected properly.
• Check that the USB driver is installed correctly.
• In Reydisp Evolution, verify that "Do NOT Check Communications
Connection" is selected in the Advanced properties.
• In Reydisp Evolution, check that the Relay Address is set as "1" in the
Relay menu.
• Ensure that IEC 60870-5-103 is specified for the connected port
(COM1 or COM2).
• Check that the correct DC voltage is applied and that the polarity is
correct.
• Check that the binary input settings such as the pick-up and drop-off
timers and the status inversion function are correctly set.
• Check the relay mode (Local or Remote) and binary input mode
(Local or Remote) configured in the settings.
• Check the paper strip between battery clip and battery.
• Check the battery is connected with the proper polarity.
• Check the battery healthy voltage.
Chapter 6 Page 3 of 3