Using The Front Panel - Waters Prep Series Installation And Maintenance Manual

Detector or autoinjector failure
If a detector or the autoinjector fails the diagnostics test, the Startup screen
indicates so. Turn the controller off, then on again. If it fails again, call Waters
Technical Service.
Leaving the Startup screen
To leave the Startup screen, press any function key. Function keys are
explained in

Using the front panel

The front panel (see the
consists of the display screen, the On/Off Switch, and three groups of keys.
Display screen
The display screen incorporates a screen for each operation and its entries as
well as messages from the system. It also shows the cursor, a bright rectangle
against a dark background.
Controller keys
The controller has three types of keys:
• Keypad – Cursor movement keys, ENTER key, CLEAR key, and
number keys.
• Function – A row of labeled keys, on the lower front panel, that switch
system operation modes.
• Screen – A row of unlabeled keys, directly below the screen, that vary
with the screen you access.
Keypad
The Waters Prep Series controller's main keypad includes these keys:
• Cursor movement – Move the cursor in the direction each key's arrow
indicates: up, down, left, and right. The cursor location on each screen
shows as a bright rectangle. The width of the cursor generally indicates
the size of the entry allowable for any given parameter field.
• HOME – Moves the cursor directly to the home, or first entry, position
on that screen.
1-16 Overview
"Function keys" on page
figure "PrepLC controller front panel" on page
1-17.
1-7)