Technical information

Night Scan Chief
schematics in
section 4.4
Err 1,13 Mast Nested
Proximity Switch
Disagreement
The proximity switch
sensing the mast
actuator at almost
nested position has
conflicting
complementary
outputs.
There may be a
wiring problem, or a
defective proximity
switch. Check the
voltages at black
and white wires with
respect to the blue
wire. These two
voltages should be
opposite of each
other as the
proximity switch is
activated and
inactivated. The
voltages should be
close to battery
voltage or close to
ground. If they are
not, replace the
actuator almost
nested proximity
switch. Refer to
system schematics
in section 4.4
Err 1,14 Mast Down
Magnetic Switch
Disagreement
The magnetic switch
sensing the mast is
lowered (referring to
tube set) has
conflicting
complementary
outputs.
There may be a
wiring problem, or a
defective proximity
switch. Check the
voltages at J3 pins 5
and 7 with respect to
pin 6. These two
voltages should be
opposite of each
other as the
magnetic switch is
activated and
inactivated. The
voltages should be
close to battery
voltage or close to
ground. If they are
not, replace the
Mast Down switch.
Refer to system
schematics in
section 4.4
Err 1,15
Actuator 90
°
Proximity Switch
Wiring Error
The proximity switch
sensing the mast
actuator at 90
°
appears to have its
complimentary
This check is only
made at power-up
when the mast
thinks it is nested.
The wires on pins 1
Revision 1 4-12