StorageTek L180, Service Manual

Page: 71 / 266

95897 Fifth Edition 3-3
TIP 1000: AC Power Problems
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TIP 1000: AC Power Problems
Use this TIP to troubleshoot AC power problems.
WARNING:
Make sure you follow the procedures in
“Safety” on page xxi .
Problem Conditions That Could Cause This Problem
The PDU breaker trips. • Defective AC PDU
• Defective power cable
• Incorrect power source
• Defective tape drive
1. Open the rear door.
2. Is the power cord seated properly?
Yes: Go to step 3 .
No: Reseat the power cord.
3. Power off all the tape drives.
4. Lift the PDU breaker.
Does it trip?
Yes: Go to step 5 .
No: Power on drives, one at a time, to see
which drive causes the breaker to trip.
Replace the defective drive. Go to “TIP
5000: Tape Drives” on page 3-13 .
5. Disconnect the power cable from the
customer receptacle. At the male pins
on the power connector, use a volt/
ohmmeter (set to
ohms ) to check
between the following male pins on
the power cable:
• 1 phase pin to GND = open
• 2nd phase pin to GND = open
• 1 phase to 2nd phase = <1 M
Ω
• GND pin to frame = short
Are the measurements correct?
Yes: Go to step 9 .
No: Go to step 6 .