Technical information

Troubleshooting and Repair
49
Identifying Faults
Flowchart 1: Getting Started
Yes
No
Flowchart 1:
Power subsystem is faulty.
Check Power Subsystem in the Control
Cabinet.
Check connection between AC mains and
rear of cabinet.
Check connection between PDU and
backplane.
Replace Power Supply
Swap Control Cabinet.
Are
all system LEDs on
the Control Cabinet
out?
Start
Yes
No
No
Yes
Is the operating system intact? Check the Main Control
Card’s “active” LED.
NO: any other state (e.g., on steady, off steady).
YES: slow, steady flashing (1 second flash rate).
Maintenance terminal
troubleshooting
Flowchart 5:
A
B
Is the maintenance
terminal operating?
(Ensure that maintenance
terminal is connected to
the maintenance port on
the Control Cabinet)