Waters ACQUITY UPLC I-Class, System Manual, Page: 33 / 68

Preparing system hardware 3-3
Power LED
The power LED, on the left-hand side of a module’s front panel, indicates the
power-on or power-off status of the module. This LED is green when power is
applied to the unit and unlit when power is not applied.
Tip:
To provide adequate ventilation, the sample manager fans run
continuously, even when the power switch is in the “off” position. These fans
switch off only when you disconnect the power cable from the back of the
module.
Status LEDs
Flow LED (binary solvent manager)
The flow LED, on the right-hand side of the power LED on the binary solvent
manager’s front panel, indicates the flow status. A steady green flow LED
indicates flow through the binary solvent manager.
Run LED (sample manager)
The run LED, on the right-hand side of the power LED on the sample
manager’s front panel, indicates the run status. A steady-green run LED
indicates that injections are being run.
Lamp LED (detector)
The lamp LED, on the right-hand side of the power LED on the detector’s
front panel, indicates the lamp status. A steady green lamp LED indicates
that the lamp is ignited.
Status LED indications:
LED mode and color Description
Unlit • Binary solvent manager and sample manager
– Indicates the device is currently idle.
• Detector – Indicates the detector lamp is
extinguished.