User`s guide

Troubleshooting
364
Fault: Valco-A, B, C or D Valve Failed
Cause: A Valco valve cannot be initialized. Valco valve A
is the heated valve used for normal operation. Valve
D is the internal standard valve. Valves B and C are
components of the online accessory.
Action: Contact your PerkinElmer service engineer.
Fatal Errors
NOTE: Fatal errors and tube deviations are cleared when the
ATD/TD is switched off. Record the details of the fatal
error and tube deviations before switching off the TD.
NOTE: A fatal error will cause the TD or ATD to stop immediately.
All heated zones are turned off. The entries on the Log tab
are cleared when the TD or ATD is reset. Record the details
of the failure before switching off the TD or ATD. The Log
tab is cleared when the next run is started.
A fatal error is a malfunction from which the ATD/TD cannot
recover without user intervention. When a fatal error occurs, the
current analysis or the sampling sequence stops immediately and all
heaters are switched off. A number of consecutive tube leak
deviations equal to the Tube Retries setting + 1 will also be treated
as a fatal error and sampling will stop.
If the fatal error occurred during a sequence in which deviations
have already occurred, then the Log tab will be displayed. The error
message: Unable to Proceed will be shown on the status line. An
error message for the current tube will describe the nature of the fatal
error.
If no deviations have occurred during the current sequence, then the
controlling method will remain displayed. The status will contain a
description of the error and the message Unable to Proceed will be
shown on the status line.
The ATD/TD can only recover from a fatal error if it is switched off
and restarted.
The information on the Log tab can be used to diagnose instrument
faults and will cause the TD or ATD to stop. If these occur and