Problem Resolution; No Leds Lit - HP Surestore Disk Array 12h - And FC60 Service Manual

Problem Resolution

No LEDs lit

All power to the fan assembly has failed. This is an indication the two of the PDUs and possibly the third
are not supplying power to the arrays, thus indicating that none of the array enclosures are operating.
This could be caused by a general power failure at the site, tripped circuit breakers for the circuits
delivering power to the rack, or unplugged power cables. If these are not the causes, problem diagnosis of
the rack is as follows:
1. Are the PDU circuit breakers tripped? Check the PDU circuit breakers. The PDUs are located
at the back of the rack. The circuit breakers are black buttons located at the bottom of each PDU.
When a circuit breaker is tripped, the black buttons will be popped out. Locate and remove the cause of
any overload. Reset the circuit breaker by pushing in on the black buttons.
2. Are both plugs of the exhaust fan assembly plugged in? Although unlikely, it is possible that
the exhaust fan assembly is not plugged in. If necessary, plug the exhaust fan assembly power
cords into their receptacles.
CAUTION! This condition is critical, as the fans are not cooling the disk storage units in
the rack, and disk drive reliability may be compromised.
When the power fail condition is corrected, both green LEDs on the rack front should light, indicating that
at least two of the PDUs are functioning.
Appendix D. Back-to-Back Racking
Problem Resolution
255