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Fans
IT cooling fan
HP POD 20c fans operate at variable speeds to maintain the cold to hot aisle differential pressure and hot
aisle temperature setpoints that are programmed in the ECS.
The fan speed adjusts to maintain the programmed setpoints. Do not manually adjust the fan speed.
CAUTION:
a fan or fan bank.
CAUTION:
the fan. De-energizing working fans reduces the IT cooling airflow within the zone. Take this into
consideration when deciding whether to continue operating IT equipment within the affected
zone. HP recommends powering down all of the IT in the zone.
IMPORTANT:
The HP POD 20c has 3 banks of 6 fans, for a total of 18 fans per zone. These fans circulate cool air from the
heat exchangers throughout the POD.
You need a screwdriver to remove and replace the IT cooling fan.
Removing the variable speed IT cooling fan
Take manual control of the fan speed in the affected zone from the ECS panel.
1.
Set the fan speed to zero.
2.
Power must be removed from the fan power assembly before removing or replacing
De-energize any additional working fans within the affected zone before replacing
HP recommends leaving the fans in AUTO mode during normal operation.
Removal and replacement procedures 28
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