
Maintenance
Troubleshooting
G52--001EN03
1/2
02--2011
© ALSTOM 2010. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be
relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is
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strictly prohibited.
GRID
Troubleshooting
Failures’ table
The table here below gives the exemples of presumed failures including the
remedical measures :
EXAMPLE OF TROUBLE 1 :
Operating mechanism does not perform
opening or closing operation
Cause of the presumed failure
Remedical measures
D
Tripping voltage lacking ?
D
Coil defective ?
D
Auxiliairy contacts do not transmit
the order ?
D
...
D
Secure the supply voltage
D
Replace the coil
D
Proceed to adjust the auxiliary
contacts
D
Position checking of spring condi-
tion
D
...
EXAMPLE OF TROUBLE 2 :
Spring operating mechanism does not
charge automatically
Cause of the presumed failure
Remedical measures
D
M.c.b. tripped ?
D
Supply voltage lacking ?
D
Motor defective ?
D
Relay defective ?
D
...
D
Switch the m.c.b. on
D
Secure the supply voltage
D
Replace the motor
D
Replace the relay
D
...
EXAMPLE OF TROUBLE 3 :
Incorrect contact in the operating mecha-
nism due to the corrosion
Cause of the presumed failure
Remedical measures
D
Heating m.c.b. tripped ?
D
Heating voltage lacking ?
D
Heating resistor defective ?
D
Mechanism housing not tight
D
...
D
Switch the m.c.b. on
D
Secure the heating voltage
D
Replace the heating plate
D
Check the housing seals, if neces-
sary replace them.
D
...
Continued on next page.
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