System Errors
6-18 72A-1589 Rev. C 02/01
D
DD
D
R
RR
R
A
AA
A
F
FF
F
T
TT
T
3
33
3
/
//
/
5
55
5
/
//
/0
00
0
1
11
1
High voltage heart
beat
Five-second software timeout on
lack of communication while
hazardous voltages may be present
on the front panel terminals. The
F6000 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 ProTesT.
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 (see ”Cooling
Fan Checks” on page 6-10).
Replace the fan assembly if
required (page 7-22). If the fans are
functioning, replace the power
supply circuit board (page 7-17).
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. (”Logic I/O Printed Circuit
Board Checks” on page 6-9).
Replace the board if necessary
(”Circuit Board Replacement”
on page 7-17).
Source Disabled One or more sources were disabled
by the hardware.
Verify the status of the amplifier
circuit boards (refer to
”Voltage or
Current Amplifier Board Checks”
on page 6-10
). Replace the board if
necessary (”Circuit Board
Replacement” on page 7-17).
Table 6.7 System Errors (Continued)
Error Explanation Action
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