
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
31
PARAMETER
DESCRIPTION
FAULT CODE
1024
FAULT MESSAGE BKT-M Aux Contact ckt. Open. Run Auto/Manual Test.
Can’t Motor: Electrical Control Problem.
RESTRICTIONS
Motoring Prohibited
ALARM BELL
30 Sec.
RESET LEVEL
Low, Manual
After manual reset if the fault still present, the fault will be generated
again.
FAULT
RECOVERY
Autometic when BKT-M Aux. Contact circuit closes.
PROBABLE
CAUSES
1. Wiring faulty causing low status level of BKT-M feed back.
2. BKT Interlock
FAULT
ISOLATION
13 & 14 numbered Green LEDs on the digital input card MDIP-16 in slot
10 indicate the status of BKT position in the following pattern.
BKT position
Green LED - 13 Green LED - 14
BKT in Motoring Position
ON
OFF
BKT in Dynamic Brake Position
OFF
ON
1. Check BKT Aux. Contactacts for any dislocation of contacts /
disconnected wires. In any found rectify or replace the Aux.
Contacts if necessary. Ensure proper closing of Aux. Contacts both
in motoring and dynamic brake position. Reset the message.
2. Ensure control air pressure is 5 Kg/Cm
2
. Set the display mode to
“Manual Tests for outputs” under Test Mode menu by pressing the
following keys in the same sequence. ‘Menu’ + 3 + (Pass code) + 3
+ ‘Enter’ + 09 + ‘Enter’ + 1 to operate magnet valve of BKT
motoring side.
3. BKT is operated to motoring side. Ensure the aux. Contacts are
operated and closing properly. Check the status of Green LEDs on
the Digital Input card in slot 10.
4. If Green LED-13 is not ON, then
A. Check the supply between wire terminal 51 at the common
terminal of the Auxiliary contacts of BKT and wire 4.
a) If the voltage is zero, then wire 51-loop open circuited.
Check and replace.
b) If voltage is > 65 V, then check the voltage between Aux.
Contact BKTM and 4.
c) If voltage is zero, then the Aux. Contact is bad. Check and
clean. If necessary replace.
d) If the Voltage is > 65V, then check the voltage between wire
terminals BKTM and 4 at the backside TB.
e) If voltage is zero, then the wire BKTB between Aux. Contact
and backside TB is open circuited. Check and replace.
f) If the voltage is more than 65V, then the wire BKTMFB
bwteeen backside TB and MEP-660 open circuited. Check
and replace.
5. Press the keys listed with in brakets on the display unit in the same
sequence (0 + ‘Menu’ +’Menu’ + 5). The display returns to normal
mode. Reset the fault and release the loco.