Areva MiCOM P225, Technical Manual

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Maintenance P225/EN CM/B11
MiCOM P225 Page 13/18
7. PROBLEM SOLVING
7.1.1 Password lost or not accepted
Problem:
Password lost or not accepted
Cause:
MiCOM P225 relays are supplied with the password set to:
AAAA
This password can be changed by the user (refer to the OP. PARAMETERS menu).
Action:
There is an additional unique recovery password associated with the relay which can be
supplied by the factory or service agent if provided with details of the model and serial
number (under the upper flap on the front panel). Contact your AREVA local dealer or the
AREVA T&D After Sales Department with the serial number (phone: 33 (0)4 67 20 55 55).
7.1.2 Communication
7.1.2.1 Values measured locally and remotely
Problem:
Values measured locally and remotely (via RS485 communication) differ.
Cause:
The values accessible on the front panel via the MEASUREMENT menus are refreshed
every second. Those fed back via communication and accessible via the AREVA T&D
setting software generally have settable refresh frequencies. If the refresh frequency of the
supervision software differs from that of the MiCOM relay (1s), there may be a difference
between the indicated values.
Action:
Adjust the refresh frequency for the measurements of the supervision software or the
support software to 1 second.
7.1.2.2 MiCOM relay no longer responds
Problem:
No response from the MiCOM relay following a request by the supervision software: no
communication fault message.
Cause:
Normally this type of problem is linked to a configuration error in the MiCOM relay
communication parameters.
Action:
Check that the MiCOM relay communication parameters (data rate, parity, etc.) are in
accordance with the supervision software.
Check the MiCOM relay network address.
Check that this address is not used by another device connected on the same LAN.
Check that the other devices on the same LAN respond to supervision requests.