Troubleshooting - Siemens SDV-4A Instruction Manual

Overhaul

Troubleshooting

Problem
Breaker fails to close
Symptoms
Closing springs will not automati-
cally charge.
Closing springs charge, but
breaker does not close.
• Closing coil, or solenoid
(52SRC) fails to energize.
No sound of breaker closing
• Closing coil, or solenoid
(52SRC) energizes.
No sound of breaker closing
• Closing coil energizes. Sound
of breaker closing is heard, but
breaker contacts do not close.
Possible Causes and Remedies
1. Secondary control circuit is
de-energized or control circuit
fuses are blown. Check and
energize or replace if necessary.
2. Damage to wiring, terminals or
connectors. Check and repair
as necessary.
3. Failure of charging motor (88).
Check brushes and replace if
required.
4. Motor cutoff switch (LS1) fails
to operate. Replace if necessary.
5. Mechanical failure of operating
mechanism. Refer to factory or
authorized service shop.
1. Secondary control circuit
de-energized, or control circuit
fuses blown. Correct as
indicated.
2. No closing signal to TB4.
Check for continuity and correct
relay logic.
3. Failure of anti-pump relay (52Y)
contacts 21-22 or 31-32 or 13-14.
Check and replace as required.
4. Failure of close coil (solenoid)
(52SRC). Check and replace
as required.
5. Auxiliary switch NC contacts
3-4 are open when breaker
contacts are open. Check
linkage and switch. Replace or
adjust as necessary.
6. Spring charged switch (LS2) NO
contact remains open after
springs are charged. Check and
replace as required.
1. Check close latch position.
Repair or adjust as necessary.
See spring release latch "bite"
adjustment, page 30.
1. Mechanical failure of operating
mechanism. Check and contact
factory or authorized service
shop.
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