22
TROUBLESHOOTING
Table 5.
Troubleshooting
PROBLEM
POTENTIAL CAUSES
SOLUTIONS
Front panel Power button does not turn on
The button has been pushed on and
off within 3 seconds.
The front panel Power button has a 3 second
delay between when it is turned off and on in
rapid succession. This is a safety mechanism
to ensure there is no damage to either the
QCL instrument or the attached load.
The rear panel switch is off.
Turn the rear panel switch to the on or |
position.
The Enable button does not turn on
The button has been turned on and off
within 2 seconds.
The button cannot be pressed faster than
every 2 seconds.
The QCL D-SUB interlock or Active
Interlock connections are open, or the
keyswitch is in the LOCKED position
•
Make sure PIN 1 and PIN 2 on the QCL
D-SUB are shorted.
•
The “Active Lock” BNC connector may
be open. Install a BNC shorting plug.
• Rotate the key to the UNLOCKED
position.
The instrument experienced an
internal fault.
(See
Error Messages
on
page 24
.)
The instrument will remain disabled until
manually powered off and then on using the
rear panel power switch.
The instrument heatsink temperature
has exceeded 70ºC.
Allow the instrument to cool down and then
press the front panel power button.
The front panel Power button is not
on.
Press the Power button on the front panel to
enable the display.
The instrument is on but the front panel
display is blank
The instrument experienced an
internal fault.
(See
Error Messages
on
page 24
.)
Switch the back panel power button off and
then on again, and turn the front panel power
button on.
The internal temperature has reached
an unsafe level.
Allow the instrument to cool down and then
switch the back panel power button off and
then on again, and turn the front panel power
button on.
The front panel Power button is
pulsing on and off in standby mode.
Press the Power button on the front panel to
enable the display.
The date and time on my VI scan fi le are
wrong
The QCL instrument does not have a realtime
clock. When a VI scan fi le is created, the date
and time stamp are randomly chosen.
The VI scan fi les are not in the order that
they were created
Some fi les may have been deleted off
of the USB fl ash drive.
When fi les are deleted off of the USB fl ash
drive and new fi les are saved to it, the new
fi les are given sequentially the names of the
deleted fi les.
Unable to create new VI scans
The interlocks may not be satisfi ed.
Turn the keyswitch to UNLOCKED, or
install the ACTIVE LOCK BNC and passive
interlocks.
There are too many fi les on the USB
fl ash drive.
Delete fi les from the USB fl ash drive.
I can’t fi nd my VI scan fi les
VI scan fi les are named sequentially.
If fi les have been deleted from the fl ash drive,
any new fi les added are named sequentially
and have the names of the deleted fi les.
The fan keeps coming on
The internal temperature is being
regulated.
To reduce internal heat generation, choose a
lower supply voltage. The instrument will shut
down if the internal temperature gets too hot.
