Instruction manual

Controls and Lights
This section describes the switches and lights on a 2104 Model DU3 or TU3.
The 2104 has no main power switch. However, each fan-and-power-supply assembly
has an On/Standby switch.
You can see the 2104 lights at the front of the 2104 Model DU3 or TU3.
Power light 1
The Power light, which is green, comes on and stays on continuously when
power is supplied to the 2104 by one or both of the fan-and-power-supply
assemblies within the 2104.
Check light 2
The Check light, which is amber, comes on if a failure occurs in the 2104.
Note: The 2104 might be able to continue operating correctly even when the
failure of a single part has been detected.
Figure 4. Disk Enclosure Lights on a 2104 Model TU3 (Left) and a 2104 Model DU3
(Right)
Chapter 1. Using the 2104 Model DU3 or TU3 7