Operating Instructions

Chapter 5—Troubleshooting
5-20 Siemens Building Technologies, Inc.
3. 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.
4. 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.)
5. Contact your local Siemens Building Technologies representative to set the
actuator’s run-time to the correct value.
Relay Module Troubleshooting
Figure 5-6 shows the most common relay module from Siemens Building Technologies for use
with the ATEC.
In the text that follows, find the symptom that best describes the problem you are experiencing
and perform the corrective action. If the problem persists, contact your local Siemens Building
Technologies representative.
WARNING:
A relay module is a high voltage device! Always
remove power before attempting to service it.
A. Relays cycle ON/OFF improperly or do not energize.
1. Check wiring to and from relay module for correct placement and continuity. Correct
wiring if necessary.
2. Check that the correct controller application is selected.
3. Check that wiring connects to proper DOs on the controller. See Table 5-4 and
Figure 5-6.
4. If Powers Process Control Language (PPCL) is continuously commanding relays ON
and then OFF, contact your local Siemens Building Technologies representative to
have PPCL code corrected as necessary.
5. Replace relay module. Contact your local Siemens Building Technologies
representative.