VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin
11
If the fault indication lights illuminate during autocalibration, then the
autocalibration sequence could not be successfully completed. Refer to the
troubleshooting section for more information.
No other operating modes can be entered during autocalibration, and entering
autocalibration mode overrides any previous mode of operation.
Accessories
External Feedback Potentiometer for Actuators without Servos
Potentiometers for external feedback are available for field installation on
VA9072, VA-9073, VA-9074, VA-9075, VA-9076, VA-9077, and VA-9078
actuators.
IMPORTANT:
In special instances where dual potentiometers are required
(such as when a servo is installed and an external feedback potentiometer is also
required), you must make modifications to the switch plate - including locating,
drilling, and tapping two new mounting holes. Consult the local Johnson
Controls representative for instructions.
FI
G
:p
tn
tm
tr
Figure 5: Potentiometer for VA-907x Series Actuators