HP A3312A - Manual (Page 53)

Troubleshooting & Diagnostics
Troubleshooting Procedures
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Troubleshooting
Fan Module Troubleshooting Procedure
CAUTION! To maintain proper cooling within the storage system, a failed fan module
must remain in the fan slot until a replacement fan module is installed. A missing fan
module will cause the storage system to overheat and power off.
NOTE! The storage system is designed to operate with two fan modules, regardless of the
number of storage modules installed.
If a fan module fails (see Table 6), check the following:
1. An amber status light indicates the fan speed is too slow, or the fan has stopped blowing air.
2. If both fan modules fail, the power modules will automatically power off in 3 to 7 seconds to avoid
overheating. A SCSI bus reset will occur at this time.
Power Module Troubleshooting Procedures
CAUTION! The following conditions will cause a power module to power off in 3 to 7
seconds: (1) two failed fan modules, (2) a power supply internal fan failure or other
internal component failure, or (3) an over-current condition caused by a faulty storage
system module, a device in one of the four upper slots set to SCSI ID 0, or using an
unsupported device with a high current rating.
Each power module contains a power supply with an internal fan for cooling. Two power modules
(redundant configuration) use active current sharing to share the power load equally. If one power module
fails or is removed, or if one of the ac power cords is accidentally removed, the other power module takes
over the entire power load without interruption.