Siemens Argus 7SR21 Technical Manual page 594

7SR210 & 7SR220 Commissioning & Maintenance Guide
5.3 Troubleshooting
Table 5-1 Troubleshooting Guide
Observation
Relay does not power up.
Relay won't accept the password.
Protection Healthy LED flashes
LCD screen flashes continuously.
Backlight is on but no text can be seen.
Scrolling text messages are unreadable.
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.
If the above checklist does not help in correcting the problem please contact the local Siemens office or contact
PTD 24hr Customer Support, Tel: +49 180 524 7000, Fax: +49 180 524 2471, e-mail:
support.energy@siemens.com.
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Action
Check that the correct auxiliary DC voltage is applied and that the
polarity is correct.
The Password being entered is wrong. Enter correct password.
If correct password has been forgotten, note down the Numeric
Code which is displayed at the Change Password screen e.g.
Change password
= 1234567
To retrieve the password, communicate this code to a Siemens
Protection Devices Ltd. representative.
General failure. Contact a Siemens Protection Devices Ltd.
representative.
The LCD has many possible error messages which when
displayed will flash continuously. These indicate various processor
card faults.
General failure. Contact a Siemens Protection Devices Ltd.
representative.
Adjust the contrast.
Adjust the contrast.
This is normal operation, default instruments are enabled.
Remove all instruments from the default list and only add those
that are required.
Check that all of the communications settings match those used
by Reydisp Evolution.
Check that the Tx and Rx fibre-optic cables are connected
correctly. (Tx –> Rx and Rx –> Tx).
Check that all cables, modems and fibre-optic cables work
correctly.
Ensure that IEC 60870-5-103 is specified for the connected port
(COM1, COM2, COM3 or COM4).
Check that the Data Echo setting on all relays is set to ON.
Check that all relays are powered up.
Check that all relays have unique addresses.
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.
© 2013 Siemens Protection Devices Limited