Siemens GMI Series

Overhaul
Troubleshooting
Problem
Symptoms
Possible
Causes
and Remedies
Closing
springs
will
not
automatically
charge
.
1
.
Secondary
control
circuit
is de
-
energizied
or
control circuit
fuses
are
blown
.
Check
and
energize
or
replace
if
necessary
.
2
.
Secondary
disconnect
contacts
15
or
16
are
not
engaging
.
Check
and
replace
if
required
.
3
.
Damage
to
wiring
,
terminals
or
connectors
.
Check
and
repair
as
necessary
.
4
.
Failure
of
charging
motor
(
88
)
.
Check
brushes and
replace
if
required
.
5
.
Motor
cut
-
off
switch
(
LS
1
)
fails
to
operate
.
Replace
if
necessary
,
6
.
Mechanical
failure of
operating
mechanism
.
Refer
to
factory
or
authorized
service
shop
.
Breaker
fails
to
close
Closing
springs charge
,
but breaker
does
not
close
•
Closing
coil
,
or
solenoid
(
52
SRC
)
fails
to
energize
.
No sound
of
breaker
closing
.
1
.
Secondary
control
circuit de
-
energized
,
or
control circuit
fuses
blown
.
Correct
as
indicated
.
2
.
No
closing signal
to
secondary
disconnect
pin
13
.
Check
for
continuity
and
correct
relay
logic
.
3
.
Secondary
disconnect
contacts
13
or
15
are
not
engaging
.
Check
and
correct
as
required
.
4
.
Failure
of
anti
-
pump
relay
(
52
Y
)
contacts
21
-
22
or
31
-
32
or
13
-
14
.
Check
and
replace
as
required
.
5
.
Failure
of
close coil
(
solenoid
)
(
52
SRC
)
.
Check
and
replace
as
required
.
6
Auxiliary
switch
NC
contacts
3
-
4
are
open
when
breaker
contacts
are
ODen
Check
linkage
and
switch
.
Replace
or
adjust
as
necessary
.
7
.
Spring
charged
switch
(
LS
2
)
NO
contact
remains
open
after
springs
are
charged
.
Check
and
replace
as
required
.
1
.
Mechanical
failure of
operating
mechanism
.
Check
and
contact
factory
or
authorized service
shop
.
•
Closing
coil
energizes
.
Sound of
breaker
closing
is
heard
,
but
breaker
contacts
do
not
close
37
Courtesy of NationalSwitchgear.com