Carrier 50PD05 Operating And Service Instructions page 28

Initiate economizer calibration (Service Test--,INDP--, E.CAL)
using the Service Test menu. The economizer calibration
procedure will try to find new maximum open and closed
positions. If the alert does not clear automatically after the
calibration procedure is complete, investigate what is limiting
economizer rotation. After that step, run another calibration, but
first power off unit (spring return the damper), loosen the
actuator clamp, and while pushing the damper closed tighten the
clamp. This alert resets automatically.
Economizer Damper Actuator Torque Above Load Limit
This alert occurs when the actuator load is too high. Investigate
to determine what is increasing damper load and verify that the
actuator is the correct size for the unit. This alert resets
automatically.
• Economizer Damper Actuator Hunting Excessively
This alert occurs when the commanded damper position is
changing too rapidly. The stop jog ration must be less than 21%
to clear this alert. Leave the actuator powered with no signal for
a few hours to allow the ratio to decrease (may have to wait
longer than a few hours). If the alert continues, determine if the
ECB or actuator is bad. This alert resets automatically.
• Economizer Damper Stuck or Jammed
This alarm occurs when the actuator senses it can no longer
move. Investigate what is stopping the rotation of the actuator
and fix. This alert resets automatically.
• Economizer Damper Actuator Mechanical Failure
This alert occurs when the actuator senses a catastrophic failure.
Investigate actuator and replace if necessary. This alert resets
automatically.
• Economizer Damper Actuator Direction Switch Wrong Position
This alert occurs when the economizer damper direction switch
is in the wrong position. The direction switch should be in the
clockwise position and the actuator should be mounted so that
the CW face of the actuator is accessible. Correct if necessary.
This alert clears automatically.
Alert Code T415 - IAQ Input Out of Range
This alert occurs when the IAQ input (on ECB) is less than 3.5 mA
and the sensor is configured as installed. IAQ operation will be
disabled. Check sensor and wiring. This alert clears automatically.
Alert Code T416 - OAQ Input Out of Range
This alert occurs when the OAQ input (on ECB) is less than 3.5
mA and the sensor is configured as installed. OAQ operation will
be disabled. Check sensor and wiring. This alert clears
automatically,
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