
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
217
PARAMETER
DESCRIPTION
FAULT CODE
1208
FAULT MESSAGE GF Auxiliary Contact 1 Circuit OPEN FAULT
RESTRICTIONS
None
ALARM BELL
--
RESET LEVEL
Low, Manual
If the fault condition is still present when cleared manually, the fault
will be generated again.
FAULT
RECOVERY
Automatic when GF auxiliary contact 1 is detected as closed.
PROBABLE
CAUSES
1. Defective Aux. Contact.
2. Defective wiring.
FAULT
ISOLATION
1. Set the display mode to ‘Manual Test for outputs’ under ‘Test Mode’
available in main menu. The display exhibits certain conditions to
be full filled. After that press Enter key to start testing of outputs.
2. Enter 13 against channel no. and then press Enter key to test GF
contactor. Press 1 to energise the contactor and 0 to de-energise
the contactor.
3. Press 1 to energise the GF contactor. The contactor should pick up.
4. Check the status of the Green LED 0 on the digital input card
MDIP16 in slot No. 11.
5. If the Green LED is not glowing, check the voltage between wire
No. 51 at the GF contactor Aux. Contact 1 and locomotive 4wire.
A. If the voltage is zero, check the continuity of 51-wire loop
connected to the GF contactor Aux. Contact 1.
B. If the voltage is more than 65V, check the voltage between
GFFB1 and locomotive 4 wire.
a) If the voltage is zero, GF contactor aux. Contact 1 is bad.
Replace the aux. Contact or GF contactor.
b) If the voltage is more than 65V:
1) Check the slackness of the connector at MEP-660 control
unit for the cable ID: AV. If found slack tighten the
connector.
2) Check the continuity of the wire GFFB1 from the Aux.
Contact to cable (ID: AV) connector Pin – A. If necessary
replace the cable.
3) If the Green LED is not glowing still, the digital input card
MDIP16 in slot No. 11 is defective.
6. If the Green LED is glowing but corresponding Yellow LED is not
glowing and the fault is getting logged the digital input card
MDIP16 in slot 11 is defective.