Diagnostics Failure; Keypad And Display Overview - Waters 515 HPLC Operator's Manual

initial screen (the screen showing model and version information),
simultaneously press the Down and Menu keys. This has no effect on pump
operation, and can be performed at any time.
LCD display - ready state
FLOW
0.000ml

Diagnostics failure

A diagnostics failure is indicated by one of the following conditions:
• The LCD display shows no information and the pump does not operate.
This condition occurs during an EPROM check failure, a RAM test
failure, an FPGA check failure, or an MPU check failure.
• The LCD display indicates an EEPROM check failure and prompts you
to press the Menu key. Pressing the Menu key acknowledges the failure
and sets all parameters to their factory defaults.
See "Maintaining and Troubleshooting the Waters 515
information about dealing with EEPROM diagnostics failures.

Keypad and display overview

Use the keypad and LCD display to enter or edit operating parameters for the
pump. This section provides detailed information about the keypad and
display, and describes their use with the pump.
Local and remote operation
You can program the 515 pump for local (stand-alone) or remote operation by
setting the Mode parameter to the Local or Rem setting, respectively.
Although you can edit or enter all 515 pump parameters when it is in the Rem
mode, the values of some pump parameters (flow rate, high-pressure limit,
and low-pressure limit) are superseded by the values communicated from the
external control device. See the Flow, HPL, and LPL parameters in the
titled "515 pump operating parameters" on page 3-7
1.000 Ready
psi
0
Pump", for more
for more details.
Keypad and display overview
table
3-3