ABB RELION 620 Series Operation Manual page 111

1MAC456939-IB D
620 series ANSI
Operation Manual
An indication about the fault is shown as a message on the LHMI. The text Internal
Fault with an additional text message, a code, date and time, is shown to indicate the
fault type.
Different actions are taken depending on the severity of the fault. The protection relay tries
to eliminate the fault by restarting. After the fault is found to be permanent, the protection
relay stays in internal fault mode. All other output contacts are released and locked for the
internal fault. The protection relay continues to perform internal tests during the fault
situation.
The internal fault code indicates the type of internal relay fault. When a fault appears,
record the code so that it can be reported to ABB customer service.
A071144-ANSI V1 EN
Figure 77: Fault indication
Table 20: Internal fault indications and codes
Fault indication
Internal Fault
System error
Internal Fault
File system error
Internal Fault
Test
Internal Fault
SW watchdog error
Internal Fault
SO-relay(s),X105
Internal Fault
SO-relay(s),X115
Internal Fault
SO-relay(s),X100
Table continues on next page
Fault code Additional information
2 An internal system error has occurred.
7 A file system error has occurred.
8 Internal fault test activated manually by the
user
10 Watchdog reset has occurred too many
times within an hour.
40 Faulty Signal Output relay(s) in card
located in slot X105
41 Faulty Signal Output relay(s) in card
located in slot X115
43 Faulty Signal Output relay(s) in card
located in slot X100
Section 7
Troubleshooting
103