
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
54
PARAMETER
DESCRIPTION
FAULT CODE
1050
FAULT MESSAGE High Current in Cutout Traction Motor 2. Can’t Load: Power Circuit
Problem
RESTRICTIONS
Motoring and Dynamic brake are Prohibited.
ALARM BELL
30 Seconds
RESET LEVEL
Medium, Manual
After manual reset if the fault still present, the fault will be generated
again.
FAULT
RECOVERY
Automatic when Traction Motor current is reduced and Master
Controller Handle is brought to Idle. Automatic Fault Reset is permitted
for maximum 3 times in an hour, after which manual clearing is
required.
PROBABLE
CAUSES
1. P32 power contactor stuck closed and there is no feed back signal
from P32 power contactor.
2. S31 power contactor tuck closed and there is no feed back signal
from S31 power contactor.
3. Wrongly connected power cables.
4. Defective digital output card.
FAULT
ISOLATION
1. Check for welded contact tips of P32 and S31 power contactors. If
welded tips are found:
A. Separate the tips and clean them.
B. Operate the power contactor manually and verify the status of
corresponding LEDs on the respective digital input card.
2. If no welded tips are found and the contactors are in good
condition, check up thoroughly the power cable connections for any
wrong connection.
3. Switch on all the breakers. If power contactors P32 or S31 are
directly picking up, then the digital output card is defective. Replace
the card.