The following elements are available:

  • STATUS LED

    The STATUS LED provides a quick visual check of the operational status of the device. When the doors are closed, the LED bar on the front side indicates the operational status.

  • Buttons

    The buttons allow you to perform certain functions directly from the device. When you press a button, a short beep confirms that the function is performed.

STATUS LED

The STATUS LED on the keypad provides the following information:

STATUS LED

Description

Off (dark)

The power to the device is turned off.

Green

The device is functioning properly.

Red

A problem or error has occurred. Check the message on the notification panel. For remedial action, see Troubleshooting.

For information about the LEDs that are present next to a button on the keypad, see the Keypad Buttons table.

Keypad Buttons

The buttons have the following functions:

Autosampler and Pump

Button

Function

DOCK

Pressing the button moves the selected pump head to the appropriate position for maintenance procedures, such as pump head or piston replacement.

When the pump head is in the maintenance position, the LED next to the FLOW button starts flashing green. Pressing the button again, returns the pump head into the position for operation. The LED stops flashing green.

FLOW

Pressing the button starts or stops the flow, considering the selected flow rate and solvent composition. The LEDs L and R next to the button refer to the left or right pump head:

  • LED is off = pump flow is off or zero

  • LED is green = pump head is delivering

  • LED is flashing green = pump head is in the position for maintenance procedures

MUTE ALARM

Beeping alerts you when the device detects a problem, for example, leakage. To turn off the beep for the current alarm, press this button. Eliminate the source for the alarm within 10 minutes. Otherwise, beeping starts again. If the device detects a different problem, beeping alerts you again immediately.

PURGE

Reserved for future use. For information on purging, see Purging (Overview).

ROTATE

Pressing the button allows rotating the carousel counterclockwise to the next loading position.

SELECT

Autosampler

  • Reserved for future use.

Pump

Pressing the button selects the pump head for which you can perform a DOCK function from the keypad:

  • LED L is green = left pump head is selected

  • LED R is green = right pump head is selected

SERVICE

The button has these functions:

  • Pressing the button one time moves the needle up from the needle seat and sets the injection valve to Bypass position. This is necessary, for example, when securing the needle unit by tightening the shipping lock screw.

  • Pressing the button a second time initializes the needle and the needle moves over the wash port.

  • Pressing the button a third time descends the needle back into the needle seat and the needle will be initialized. Note: The shipping lock screw must be loose.

VALVE

Pressing the button allows switching the injection valve to Bypass position. The LED B lights green when the injection valve is in Bypass position.

WASH

Pressing the button initiates an outer needle wash cycle, in which the outer needle surface is washed in the wash port. After the needle wash cycle, the needle moves back to the needle seat.

Column Compartment

Button

Function

MUTE ALARM

Beeping alerts you when the device detects a problem. To turn off the beep for the current alarm, press this button. Eliminate the source for the alarm within 10 minutes. Otherwise, beeping starts again. If the device detects a different problem, beeping alerts you again immediately.

TEMP CTRL

Pressing the button turns the temperature control on or off:

  • LED next to the button is green = temperature control is on

  • LED next to the button is off = temperature control is off

VALVE LEFT

Pressing the button switches the left column switching valve (if installed).

Pressing and holding the button activates the catch valve function if a VICI valve is installed in the left valve position.

With 2-position 6-port valves, the LEDs next to the button indicate the current valve position:

  • Upper LED is green = valve is in position 1

  • Lower LED is green = valve is in position 2

  • LEDs are off = valve switching

VALVE RIGHT

Pressing the button switches the right column switching valve (if installed).

Pressing and holding the button activates the catch valve function if a VICI valve is installed in the right valve position.

With 2-position 6-port valves, the LEDs next to the button indicate the current valve position:

  • Upper LED is green = valve is in position 1

  • Lower LED is green = valve is in position 2

  • LEDs are off = valve switching