ST/STR/STA MANUAL
3
118107-001 REV J
High Voltage to shut off. This circuit should be used for
safety interlock circuits. Spellman strongly recommends
the use of External Interlocking for safety purposes.
1.2.2 System Status and Fault
Diagnostic Display
“Dead Front” backlight type indicators provide system
operation and fault condition information. If a fault occurs
the power supply will revert to the POWER DOWN
mode. This is indicated by the flashing of the CONTROL
POWER ON indicator. To reset the latched fault: cycle
the CONTROL POWER ON switch, cycle the AC line
power or toggle the Reset/External Inhibit signal line.
VOLTAGE CONTROL:
Indicates the output voltage
regulator circuit is maintaining voltage regulation.
CURRENT CONTROL:
Indicates the output current
regulator circuit is maintaining current regulation.
POWER CONTROL:
Indicates the output power
regulator circuit is maintaining power regulation.
HV INHIBIT:
Indicates the high voltage supply is being
inhibited by either the EXTERNAL INHIBIT signal line
or by internal protection circuitry.
INTLK
CLOSED:
Indicates
the
EXTERNAL
INTERLOCK connections are in the closed position.
INTLK
OPEN:
Indicates
the
EXTERNAL
INTERLOCK connections are in the open position. This
also indicates opening of internal power supply interlocks.
It is not possible to enable HIGH VOLTAGE with an
open EXTERNAL INTERLOCK.
SYSTEM FAULT:
Indicates an internal fault or parallel
chassis fault (in multiple chassis systems) has occurred.
OVER VOLTAGE:
Indicates the overvoltage protection
circuitry has caused the power supply to turn off. The
default setting for the overvoltage protection circuitry is
internally set to 105% of rated output voltage. This level
can be set to anywhere from 0- 105% of rated output
voltage by the user via the remote overvoltage
programming capability, see Chapter 3 for more details.
OVER CURRENT:
Indicates the output current has
exceeded the programmed current trip level when the
AOL (Adjustable Overload Trip) feature has been
software configured using the digital interface.
OVER POWER:
Indicates the output power has
exceeded the programmed regulating level. This signal
could be either the internal potentiometer or the user
provided remote power programming signal, dependent
on configuration.
OVER TEMP:
Indicates that excessive temperature has
been sensed within the chassis and internal protection
circuitry has shut down the power supply.
ARC:
Indicates that an arc has occurred (one second
flash) or that the ARC Intervention Circuitry has
shutdown the power supply due to excessive arcing
(latched “ARC” fault).
AC FAULT:
Indicates a problem with the front end AC
input circuitry and the corresponding generated inverter
buss voltages.
RGLT ERR:
Indicates a failure in the voltage, current or
power regulation circuitry. This fault usually occurs
when there is a lack of output power to maintain proper
regulation. Possible causes could be due to low AC input
voltage (below low line parameters, or a missing phase)
or a malfunction of the power supply preventing it from
generating the voltage/current being requested.
