1030 Slbr / Slbc Contactor Stuck Closed. - Medha MEP 660 Troubleshooting Manual

MEP 660 - Trouble shooting Manual
PARAMETER DESCRIPTION
FAULT CODE
1030
FAULT MESSAGE
SLBR / SLBC Contactor Stuck Closed.
RESTRICTIONS
Motoring Prohibited Dynamic Brake Prohibited
ALARM BELL
30 Seconds
RESET LEVEL
Low, Manual
FAULT RECOVERY
Autometic. When stuck condition is released as sensed through
auxiliary contacts of SLBC1, SLBC2, SLBC3 and SLBC4.
Manual fault clearing through keyboard on the display unit. (If the
fault condition is present when cleared manually, the fault will be
generated again.
PROBABLE
1. Defective SLBR relay. (Permanently ON)
CAUSES
2. Defective MLSD16 card (slot 15)
3. Welded SLBC1/SLBC2/SLBC3/SLBC4
4. Defective wiring. (SLBC FB wire is getting +ve supply)
5. Defective MDIP16 card (Slot 13)
FAULT ISOLATION
1. Check the status of SLBR relay.
2. If SLBR is in pick up condition:
A. Check the supply voltage at SLBR coil. If voltage is more than
B. If the voltage is zero, then the relay is defective. Replace the
3. If SLBR is in drop out conditio, check status of SLBC contactors.
4. If any SLBC contactor is in pick up position, check the supply at
A. If the voltage is more than 65V, the SLBR relay is defective or
B. Replace the SLBR relay or identify the wrong supply to SLBC
5. If no SLBC contactors are in pick up condition, check for the
6. If no aux. Contacts of SLBC is welded, check the supply between
A. If voltage is more than 65V, then SLBC FB wire is getting wrong
B. If the voltage is zero, then MDIP16 card in slot No. 13 is
Doc No.: IM – 51
65V, then MLSD16 card in slot 15 is defective. Replace the
card.
relay.
the magnet valve coil.
SLBC wire is getting supply.
contactor.
welded interlocks of SLBC auxiliary contacts. If found replace the
Aux. Contacts.
SLBC FB wire and wire 4 of locomotive.
supply. Identify wrong wiring and rectify.
defective. Replace the card.
Rev.2.0 Print: October 2008
37