7SG11 Argus User Manual
©2013 Siemens Protection Devices Limited
P20006 Page 35 of 37
Section 5: Testing and Maintenance
Argus relays are maintenance free, with no user serviceable parts.
5.1 Periodic Tests
During the life of the Argus, it should be checked for operation during the normal maintenance period for the site
on which the product is installed. It is recommended the following checks/tests are carried out:-
1. Visual inspection of the metering display
2. Operation of output contacts
3. Secondary injection of each element
5.2 Maintenance
Failure of the Argus will be indicated by the ‘Protection Healthy’ LED being off or flashing. A message may also
be displayed on the LCD. In the event of failure Siemens Protection Devices Limited. (or one of its agents) should
be contacted – see defect report sheet in section
Error! Reference source not found.
.
If removal of the Argus from its case is required, the procedure described in section 3.1 should be followed.
5.3 Troubleshooting
Table 5-1
Troubleshooting Guide
Observation
Action
Relay does not power up.
Check that the correct auxiliary DC voltage is applied and that the
polarity is correct.
Relay won’t accept the password.
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.
To retrieve the password communicate this code to a Siemens
Protection Devices Limited
Protection Healthy LED flashes
General failure. Contact Siemens Protection Devices Limited.
LCD screen flashes continuously.
The LCD has many possible error messages which when
displayed will flash continuously. These indicate various processor
card faults.
General failure. Contact Siemens Protection Devices Limited.
Backlight is on but no text can be seen.
Adjust the contrast.
Scrolling text messages are unreadable.
Adjust the contrast.
Relay displays one instrument after
another with no user intervention.
Default instruments are enabled. Remove all instruments from the
default list and only add those which are required.
The ‘ ’ indicates that the instrument is a default instrument. Press
ENTER to deselect it.
(See section 2.1.2.1 Default Instruments).
The LCD is stuck at the ‘General Alarms’
screen and is displaying ‘Trip Circuit
Failure Sx’. (x = 1…5)
The trip circuit failure feature is enabled and is expecting a healthy
status input signal. Energise the correct Status Input, or disable
the trip circuit feature if it is not required.
Change password
= 1234567
A= 120A B= 123A
C= 108A E= 5A