Instruction manual

9. Verify that the green DC PWR light 1 comes on within five seconds.
If it does not, or the amber CHK light 2 comes on, verify that the new
fan-and-power-supply assembly is correctly installed.
If it is, report the problem to your service representative.
Figure 42. Fan-and-Power-Supply Lights
54 2104 Models DU3 and TU3 Operator’s Guide