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FAULT: INET RAM indicates that the RAM chip on the Interface Board is not responding properly. Typi-
cally, the RAM chip on the Interface Board should be replaced.
FAULT: INET ROM indicates that the ROM chip on the Interface Board is not responding properly. Typi-
cally, the ROM chip on the Interface Board should be replaced.
Another good technique to investigate multiple messages, after noting the currently displayed mes-
sage, is to switch the power line switch of the instrument off, and then on. This will force the instrument
to process through its initializing SelfTest. During this testing sequence, indications other than the pre-
viously displayed message may appear to provide more information.
By running the instrument SelfTest ((either at power turn- on or through the Calib and Test (Clear Dot)
Modes)), WARN: messages may appear.
The WARN: message indicates that a condition exists that may need attention. Generally, the instru-
ment remains fully operational, except for the function indicated on the visual display. Pressing any in-
strument function will erase the WARN: message. The following five WARN: messages will only appear
via the SelfTest.
WARN: MEMORY RESET indicates that the instrument memory has been reset to the default setpoints
including flow and oven calibrations. This could have been done by operator keyboard entry (see Sec-
tion 13 of this manual), by RAM replacement, or by removing the battery.
WARN: SIGNAL CHANGED indicates that a detector that was previously assigned to a particular signal
is no longer recognized. The instrument will reconfigure the signal. This may occur as a result of detec-
tor boards having been removed during a repair. If these boards have not been recently removed, sus-
pect a failure and refer to Detector Problems later in this section.
WARN: NO DETECTORS indicates that no detector boards are installed or that they are not recog-
nized as being installed by the processor. If detector boards are physically installed and not recognized,
suspect the boards, the I/O section, or the CPU section of the Main Board.
The WARN: OVEN SHUT OFF message is somewhat of a hybrid between other WARN: messages
and a FAULT: message. Similar to other WARN: messages, the WARN: OVEN SHUT OFF message
occurs most often as a result of inoperative hardware (rather than software). This may be something as
simple as the operator leaving the oven door open. However, different from other WARN: (similar to
FAULT:) messages, the WARN: OVEN SHUT OFF message may occur any time that conditions war-
rant. The operator need not run the SelfTest for this message to be displayed. WARN: OVEN SHUT
OFF indicates that the oven temperature has been shut off because it could not heat as quickly as it
should or because it cooled more slowly than it should. Suspect that the oven flap could be stuck, or
that a large thermal leak from the oven has occurred (make sure that the oven door is shut). Once the
WARN: OVEN SHUT OFF is displayed, the oven temperature will remain off until the message is
cleared. The operator need only to press the
SVC 1- 7
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Troubleshooting
