HP Performance-Optimized Datacenter, 6 m (20 ft) User Guide

Environmental control system 40
Controller Settings
Item Description
Control routine interval Sets the interval within seconds when the control routine is activated
Controller hysteresis
The controller has an actuating variable from 0 to 1000 and the fan levels are
switched on the following values:
•
Step 0–0 to 10
•
Step 1–10 to 250
•
Step 2–250 to 500
•
Step 3–500 to 750
•
Step 4–750 to 1000
When the actuating value is decreasing, the hysteresis is considered. For
example, when the fans are running at step 3, the actuating value must go
below 500. This decrease is the hysteresis for switching to step 2.
Set point
temperature/pressure
Sets the temperature and pressure set points.
Temperature and pressure
time constant
Is used by the low pass filter to smooth the measurement values.
P,I, and D gain Must be set to best practice values.
ECS alarms
The alarms pertaining to the health of the HP POD and its components are relayed through the EC.
Alarm Meaning Solution
Fan failure One of the fans is not working.
If you are still within your service
contract, contact HP service.
Sensor failure One of the sensors is not working.
If you are still within your service
contract, contact HP service.