AEC PCA SERIES Specifications download pdf (Page 29)

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 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.

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AEC PCA SERIES Specifications Page 29