Product data

All Power
Note: Unless you have a particular reason to do so, do not remove power from the
using system or from the 2104 unless the instructions that you are following tell
you to.
This section has two parts:
v Power (2104 Model DU3)
v Power (2104 Model TU3)on page 73.
Go to the part that is relevant to the Model of 2104 that you are servicing.
Power (2104 Model DU3)
Step 1. Verify with the customer that all operations between the 2104 and the using
system have been stopped.
Step 2. Refer to Figure 24.
Step 3. Set the DC On/Standby switch 1 of each fan-and-power-supply assembly to
Standby.
Notes:
a. Some 2104s have a fan-and-power-supply assembly and a fan assembly.
The fan assembly has no DC On/Standby switch.
b. A fan-and-power-supply assembly might have its CHK light on although its
DC On/Standby switch is set to On.
Figure 24. Removing the Power from a 2104 Model DU3
Chapter 3. Removal and Replacement Procedures 71