PCA Series Chillers
Page 29
Important!
Do not change any of the control settings without consulting
the AEC Service Department.
The AEC, Inc. warranty does not cover chiller failures
from tampering with controller settings!
Down Key
Each press of the
Down Arrow
key decrements or reduces
the values or settings on the
SV
display.
Up Key
Each press of the
Up Arrow
key increments or advances
the values or settings on the
SV
display.
5-5 Auto-Tuning PCA Series Chillers
The Auto-Tune function lets you fine-tune the control PID to
process requirements. Activate the Auto-Tune function whenever
the process under control changes. Don't be alarmed by control
response. It may take the process temperature above and below the
set points as many as three (3) times. It will then level off and
control to the process set point.
Auto tuning can take up to 45
minutes
, and is best done before any product is being run.
Important!
Factory default settings are: P = .3, I = 7, and D = 1
To auto-tune the controller:
Press and hold down the
AT
AT
key for several seconds until
the
AT
indicator flashes.
The
AT
LED flashes to indicate that the control is tuning
itself.When the
AT
LED light stops flashing, the controller is
tuned and ready for operation.
