Performance Tests; Self-Diagnostics - Waters Prep Series Installation And Maintenance Manual

Shutdown messages (Continued)
Message
High Pressure
Limit

Performance tests

These tests help you further isolate the problem's cause:
• Extended Test Routine for the controller
• Pressure Transducer Calibration test
• Transducer test
• Solvent Proportioning Valve Pair test
Caution:
shutting down your system before disconnecting any interconnecting
cables.
For problems you cannot resolve, contact Waters Technical Service for
assistance.

Self-diagnostics

The Waters controller performs these self-diagnostic tests on startup:
• The 68000 processor, its clock and reset circuitry, LEDs, and drive
circuitry, ROM-containing code preceding first entry
• ROM, associated address decoding, bus latch, and drive circuits
• Addresses at each RAM location, associated address decoding, bus latch,
and drive circuits
• Video RAM
• EEPROM location with interrupt, read/write, associated address
decoding, bus latch, and drive circuits
• Real-time clock, oscillator, counters, and associated interrupt circuitry
3-36 Troubleshooting, Testing, and Maintenance
Description
The value entered on the SETUP screen was
exceeded. If the high-pressure limit was set relatively
low, check for an increase in backpressure (such as an
older column with accumulated debris at the inlet
and blockage in the fluid path).
To avoid damaging any equipment, wait about 3 minutes after