Reference Code Description/Action Perform all actions before exchanging Failing Items Failing Item
1521 Power supply failure PWRSPLY
TWRCARD
1522 Power supply failure PWRSPLY
TWRCARD
CBLALL
1523 to 1524 Power supply failure PWRSPLY
TWRCARD
1526 No Power Supplies Present
The required power supplies are not installed.
PWRSPLY
TWRCARD
1530 Power Supply P03 fault/AC loss
Before replacing any parts, verify that the AC input voltage is correct.
PWRSPLY
TWRCARD
1531 Power Supply P03 fault PWRSPLY
TWRCARD
1532 Power Supply P03 Communication fault PWRSPLY
TWRCARD
CBLALL
1533 to 1534 Power Supply P03 fault PWRSPLY
TWRCARD
1611 Regulator Fault on Card Position M01 PWRREG
TWRCARD
1612 Regulator Communication Fault on Card Position M01 PWRREG
TWRCARD
1613, 1621 Regulator Fault on Card Position M01 PWRREG
TWRCARD
1622 Regulator Communication Fault on Card Position M01 PWRREG
TWRCARD
1623 Regulator Fault on Card Position M01 PWRREG
TWRCARD
1631 Regulator Fault on Card Position M06 PWRREG
TWRCARD
1632 Regulator Communication Fault on Card Position M06 PWRREG
TWRCARD
1633 Regulator Fault on Card Position M06 PWRREG
TWRCARD
1810 Load fault on the +12V bus
An isolation procedure is required for identifying which load is at fault.
PWROC
TWRCARD
1820 Load fault on the +5V bus
An isolation procedure is required for identifying which load is at fault.
PWROC
TWRCARD
1830 Load fault on the +3.3V bus
An isolation procedure is required for identifying which load is at fault.
PWROC
TWRCARD
1840 Load fault on the -12V bus
An isolation procedure is required for identifying which load is at fault.
PWROC
TWRCARD
1xxx
Chapter 2. Unit Reference Codes 87
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