F6150 / F6150A Power System Simulators User Guide
72A-2543-01 Rev. C 01/07
4-17
Open ground
detector
(Power supply)
Hardware detects an open ground detector.
This hardware problem must be
addressed before it is safe to operate
the F6150.
When the F6150 clears the error, it
occurs again if the hardware problem
has not been fixed.
Logic Output
(Logic I/O)
Hardware detects an overcurrent condition on
a logic output. The F6150 software shuts
down all amplifiers. The F6150 hardware
latches all logic outputs open.
Reboot the system. If the error
persists, replace the Logic I/O circuit
board (see Chapter 5 ”Field
Replacement Procedures” when
replacing this board).
+12 Volt fail
monitor
(DC power
supply)
Hardware disables amplifiers to prevent
damage to relays on the amplifier assemblies
if 12 V falls below a threshold of
approxi5 volts.
Check the DC power supply.
High voltage
heart beat
Five-second software timeout on lack of
communication while hazardous voltages
may be present on the front panel terminals.
The F6150 software shuts down the
amplifiers.
This fault can occur if a communication cable
is removed.
The PC gets a communication timeout and
displays it in F6CP. The system error is only
displayed when communication is
re-established.
Replace the communication cable.
Fan flow monitor
error
Fans are blocked or inoperative.
Verify fan operation.
Replace the fan assembly if required.
If the fans are functioning, replace the
power supply circuit board (see
Chapter 5 ”Field Replacement
Procedures” when replacing this
board).
Lost pulse per
second
Software shuts down the amplifiers because
it detects lost external synchronization. This
only occurs in an external synchronization
mode.
Verify that the Global Positioning
System (GPS) components are
correctly connected, and that the
Instrument is synchronized to the GPS
clock. Refer to Appendix D ”Global
Positioning System”.
Waveform
Under-run
System error in waveform generation and
I/O.
Verify operation of the Logic I/O
board.
Table 4.9 System Errors (Continued)
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