Operating Instructions

Troubleshooting Procedures
Siemens Building Technologies, Inc. 5-17
Actuator and Valve Troubleshooting
The following information describes troubleshooting procedures you should use if you encounter
a problem with a damper actuator or an electronic valve actuator. Find the symptom that best
describes the problem and perform the corrective action that follows. If the problem persists,
contact your local Siemens Building Technologies representative.
A. Actuator does not move at all.
1. Check the value of MTR SETUP (Point 58) to ensure that the actuator is enabled.
See Table 5-2.
Table 5-2. Motor Setup (Point 58).
Motor 1 (Damper)
Enabled
Enabled and
Reversed
Not Used
1 3
Enabled
5 7
Motor 2
Enabled and
Reversed
13 15
NOTE: The damper actuator on the ATEC is factory-wired to DO 1 and DO 2. This
wiring is not user-serviceable.
2. For an externally wired actuator (the valve in Application 2523 or an actuator used in
slave mode for the ATEC with Reheat), see Actuator Check on page 5-23. Check
that power is supplied to actuator.
3. For an externally wired actuator, verify actuator is correctly wired to the ATEC. The
common wire should be terminated at screw terminal 2, and screw terminals 1 and 3
should each be the termination for a hot wire (extend, retract). Rewire if necessary.
4. For a valve actuator, check that the actuator is properly secured to the valve.
5. For a damper actuator, check that the setscrew is fully tightened against damper
shaft. Follow these torque guidelines:
• 70 ± 5 inch pounds—solid metal
• 37 ± 2 inch pounds—plastic, graphite, composite, or hollow metal (Hollow metal
shafts require an insert to prevent shaft damage.)
6. Check if the controller is calibrating the air velocity sensor. While calibration is
underway, CAL AIR (Point 94) = YES. If so, verify that the actuator is functioning
properly after calibration cycle is completed (CAL AIR has returned to NO).
7. Contact your local Siemens Building Technologies representative.