VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin
16
To recalibrate the servo, press and hold the CALIBRATE button until the green
Status LED flashes rapidly (approximately 2 seconds), then release the
CALIBRATE button. The servo drives the valve to the open and close travel limit
switch settings. When the calibration is complete, the green Status LED resumes
flashing at the normal rate.
Note:
If you detect error codes 3, 5, 6, or 7, contact your Johnson
Controls representative for further information.
Table 3: Green LED Warning and Information Flash Codes
Code Description
Meaning
1
Normal Operation
The actuator detects no errors and operates normally.
2
Control Signal
Calibration Error
If this error occurs, add or remove jumpers for the input type.
3
Feedback
Potentiometer
Error
An invalid feedback potentiometer calibration is detected. To
ensure a valid feedback calibration, ensure that these conditions
exist.
The upper limit calibration is greater than the lower limit calibration.
The difference between the upper and lower limits is at least
3 volts.
The feedback potentiometer is not wired backwards.
4
Calibration in
Process
The green LED flashes rapidly during this operation.
5
Reverse Acting
Warning
This warning indicates that the servo is configured to operate in the
Reverse Acting Mode.
6
Split Range 0 to
50% Warning
This warning indicates that the servo is configured to operate in the
Split Range 0 to 50% range mode.
7
Split Range 50 to
100% Warning
This warning indicates that the servo is configured to operate in the
Split Range 50 to 100% range mode.
8
Calibration in
Process
During a calibration, the LED flashes rapidly at one-half second
intervals. When the calibration is complete, the LED resumes with
the Normal Operation flash code (Code 1) unless another warning
is still pending.
