Mitsubishi Electric MELPRO S Series Operation Manual page 23

<NOTE>
 Before checking fault records of operated relay element, please push "INDICATOR RESET" button and
turn off LEDs.
If current LED remains glowing, the LED indication of fault records is glowed with overwrapping. Because
of this, it would be difficult to distinguish the indication of fault records and the indication of current
condition. To avoid this situation, please push "INDICATOR RESET" button and turn off current LED
glowing.
 In case of occurring fault evolution, the first tripped condition is saved as latest fault record.
For example it is considered that a fault evolution from V
after few seconds from V
In the beginning, the "OPERATION INDICATOR" of V
fault record. Next, when V
record is not created.
If V fault is occurred after cleared V
BC
After the indicating the oldest
phenomenon in the save data,
it goes back to latest (1 st )
phenomenon.
fault.
AB
fault is occurred during V
BC
fault, LED of V
AB
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to V . It is assumed that the V
AB BC
is glowed and this condition is saved as a latest
AB
fault, the LED of V
AB BC
is glowed and new fault record is created.
BC
fault occurs
BC
is also glowed but new fault
JEP0-IL9537