Ransburg 9040 Service Manual page 28

9040 Low Voltage Control Unit Kit- Operation
Automatic applicators, however, typically have a
fixed distance between electrode and target and
thus it is not likely that the spray applicator would
come into close proximity with the part during normal
use. If it should, then it is desired that an overload
occur to alert maintenance so that the condition may
be corrected. Additionally, since there is no operator
with automatic applicators, the overload circuit is
required to alert maintenance when failed parts may
be causing the applicator to operate at less than
optimum performance.
When turning the overload circuit ON for
applicator units it may be necessary to adjust
the setpoint at which overload occurs. If so,
contact your
representative for assistance.
High Voltage Safety Circuit
The 9040 Main PC board contains a safety circuit
that prevents high voltage from being present at
the applicator if the high voltage trigger device
(pressure switch, PC contact, etc.) has not been
triggered. If a failure mode should occur that
would attempt to send high voltage to the
applicator, even though the high voltage trigger
has not been activated, the PC board will shut
down and enter an overload condition. If the
control unit repeatedly overloads even though the
high voltage trigger has not been activated, the
main PC board has failed and should be replaced.
25
authorized Ransburg
High Voltage ON Indicator
The red AC power ON LED will light
when the AC Power ON/OFF switch is
in the ON position.
Cable Fault/Hook OFF
Indicator
The yellow cable fault/hook OFF LED will
light whenever the low voltage signal to
the applicator is open circuited. This will
occur if the cable is not connected or if
the cable becomes damaged such that
power cannot be transmitted to the
applicator. With applicators having hook
transformer mounted ON/OFF switches,
the cable fault/hook OFF indicator will
also light when the switch is placed in its
OFF position.
CP-11-01