
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
273
PARAMETER
DESCRIPTION
FAULT CODE
2548
FAULT MESSAGE R1 Stuck Open in Auto Test
RESTRICTIONS
--
ALARM BELL
--
RESET LEVEL
--
FAULT
RECOVERY
--
PROBABLE
CAUSES
1. Defective R1 contactor
2. Defective wiring.
FAULT
ISOLATION
Most probably this fault can be logged due to delayed Pick up of the
contactor. Adjustment of Pick up / drop out values of R1 contactor
could solve the problem.
1. Check the status of the R1 contactor.
2. If the R1 contactor is in de-energized position, check the supply
across the operating coil.
3. If the voltage is more than 65V and still R1 is de-energised, then
the R1 it self is defective. Replace the contactor.
4. If voltage is zero, the digital output card MLSD16 has gone
defective. Replace the card and check up.
After adjustment / replacement o contactor perform once again auto
test and confirm that the contactor is functioning normal.
PARAMETER
DESCRIPTION
FAULT CODE
2549
FAULT MESSAGE R2 Stuck Open in Auto Test
RESTRICTIONS
--
ALARM BELL
--
RESET LEVEL
--
FAULT
RECOVERY
--
PROBABLE
CAUSES
1. Defective R2 contactor
2. Defective wiring.
FAULT
ISOLATION
Most probably this fault can be logged due to delayed Pick up of the
contactor. Adjustment of Pick up / drop out values of R2 contactor
could solve the problem.
1. Check the status of the R2 contactor.
2. If the R2 contactor is in de-energized position, check the supply
across the operating coil.
3. If the voltage is more than 65V and still R2 is de-energised, then
the R2 it self is defective. Replace the contactor.
4. If voltage is zero, the digital output card MLSD16 has gone
defective. Replace the card and check up.
After adjustment / replacement o contactor perform once again auto
test and confirm that the contactor is functioning normal.