Operating Instructions

Troubleshooting Procedures
Siemens Building Technologies, Inc. 5-19
D. Valve cannot be shut completely.
Contact your local Siemens Building Technologies representative.
E. Valve leaks.
Contact your local Siemens Building Technologies representative.
F. Actuator does not develop sufficient force to move damper.
1. Check for damper binding and correct as needed.
2. Confirm proper alignment of damper shaft in actuator bushing. Damper shaft must
not be off-center or sized improperly. See Figure 5-5.
NOTE: The damper actuator includes a 1/2-inch adapter insert ready to mount
on 1/2-inch shafts. For 3/8-inch shafts, a 3/8-inch insert is shipped in the
actuator box.
3. Make sure that the actuator 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.)
4. Contact your local Siemens Building Technologies representative.
EA1061R1
SET SCREW
DAMPER SHAFT
ACTUATOR
OUTPUT
SEGMENT
EA1062R1
GUIDE
PIECE
Figure 5-5. Damper Shaft Positioning.
G. Actuator position does not match its display value.
1. For a valve actuator, check that valve stem is screwed to actuator. If necessary,
contact your local Siemens Building Technologies representative for replacement.
2. For a damper actuator, check for damper binding and correct as needed.