position, starting with L1 -L2 (volts), and rotate
AMPS-VOLTS selector switch clockwise a step at
a time.
The circuit for the L1 -L2 position is illus -
trated in f i g u r e 3 - 2 1 .
As the selector switch is
rotated clockwise (CW), the contacts rotate CW as
shown.
(3) Install leads as kwged and remove tags.
b. Replacement. Replace defective AMPS-VOLTS
sel;ctor switch (48) as follows:
(1)
Removal.
(a) Tag AMPS-VOLTS selector switch (48)
leads and~emove screws and lockwashers which
secure the leads to the AMPS-VOLTS switch.
(b) Remove knob (43) and hardware which
secure AMPS-VOLTS selector switch (48) to panel
(96) and remove switch.
(2)
Installation. Install AMPS-VOLTS selector
switch (48) using removal steps in reverse order and
remove
3 - 1 1 3 .
See ( 6 6 ,
tags.
P a n e l
L i g h t
S w i t c h .
f i g .
3 - 1 8 ) and proceed as follows:
CAUTION
a.
panel
Open DC CONTROL CIRCUIT
BREAKER ( 2 7 , f i g . 3 - 1 7 ) be-
fore testing or replacing
PANEL LIGHT switch.
i esting.
(1) Gain access to rear of control cubicle
( 9 6 , f i g . 3 - 1 8 ) .
(2) Remove screw that secures one of the leads
to PANE!. LIGHT switch (66).
(3) With an ohmmeter test PANEL LIGHT
switch for continuity in ON position.
(4) Test PANEL LIGHT switch for open con-
tacts no continuity in OFF position.
(5) Reconnect lead to PANEL LIGHT switch.
~.
Replacement.
Replace defective PANEL
LIGHT switch (66) as follows:
(1)
Removal.
(~) Tag PANEL LIGHT switch leads and re-
move screws and lockwashers which secure leads to
switch.
(Q) Remove mounting hardware which sec-
ures PANEL LIGHT switch to panel and remove
switch.
(2)
Installation.
Install PANEL LIGHT switch
(66) usin~ removal steps in reverse order and remove
tags.
3 - 1 1 4 .
V o l t a g e
S e n s i n g
S w i t c h ,
L o c a l - R e m o t e .
See ( 6 7 , f i g . 3 - 1 8 ) and proceed as follows:
CAUTION
Open DC CONTROL CIRCUIT
BREAKER ( 2 7 , f i g u r e 3 - 1 7 )
before testing or replaciqq
VOLTAGE SENSING switch.
a.
Testing.
.
(1) Gain access to rear of control cubicle
panel ( 9 6 , f i g . 3 - 1 8 ) .
(2) Tag all VOLTAGE SENSING switch (67)
leads.
(3) Remove screws and lockwashers which
secure tagged leads to VOLTAGE SENSING switch.
(4) Place VOLTAGE SENSING switch to RE-
MOTE position.
With an ohmmeter, test for contin-
uity, (closed contacts) from center contacts to upPer
COIltaC&.
NOT E
Upper contacts are those closest
to panel hinge.
(5) Place VOLTAGE SENSING switch in LOCAL
position,
Test for continuity (closed contacts) from
center contacts to lower contacts.
(6) If the VOLTAGE SENSING switch does not
operate correctly replace it.
(7) Reconnect leads, as tag~ecf, and remove
tags.
b.
Replacement.
Replace VOLTAGE SENSING
swi~ch (67) as follows:
(1]
Removal.
(a) Tag VOLTAGE SENSING switch leads and
remove screws and lockwashers which secure leads to
the VOLTAGE SENSING switch.
(~) Remove mounting hardware which secures
VOLTAGE SENSING switch to panel (96) and remove
switch.
(2)
Installation.
Install VOLTAGE SENSING
switch (67) using removal steps in reverse order.
Remove tags.
3 - 4 1