92 Error Messages, Diagnostics, and Test Procedures
System Shutdown Response
When a shutdown occurs, the following actions occur:
1. A message appears, such as:
Shutdown Occurred - Reason:.....
2. The 600 controller sets the flow rate to 0.0 mL/min. Flow and composition can be
viewed on the screen.
3. Any subsequent inject input signals are not recognized while the system is in
shutdown.
4. The 600 controller software:
• Activates the Hold output (on the 600 controller rear panel), indicating to the
connected instrument (for example, an autosampler) that the system is not ready
for operation.
• Aborts any gradient, program event, and detector tables in process.
• Resets the Autostart time and Table # fields to blank.
• Maintains external output switches S1 through S3, sparge valves, and the Alarm
in their current state (on or off). S4 is set to the “off” state when a critical fault
occurs.
5. If the high temperature limit was exceeded or the temperature setpoint was greater
than zero and the column heater was attached, the temperature setpoint is set to OFF
(0).
6. Column heater module temperature remains constant throughout the shutdown (or
shut off depending on the situation)
7. Sparging continues at the last entered sparge rate.
Resuming Operation
The shutdown message remains on the screen until you resume operation as follows:
1. Press Clear to clear the message from the screen.
2. Check the Pump Setup screen parameters and make any adjustments to the entered
values (for details, refer to the Waters 600E Multisolvent Delivery System User’s
Guide).
3. Determine if the 600 controller received a Stop Flow signal from an external device.
If the cause is an obvious equipment malfunction, resolve the cause of the problem
and continue as follows. This may mean removing the faulty device from the
system.
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