Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 194)

Section 4 Auto-Zone Plus
4-44 Start-Up and Troubleshooting
3.3 Helpful Tips
• Position the damper to its mid position before applying power. Observe that the
damper drives in both directions during the calibration cycle following powerup.
• Observe the SCAN LED (Diagnostic Blink Codes) immediately following application
of power. The LED provides valuable information about the Zone Controller, for
more details see How It Works.
• Observe the REC LED (Communications LED); this LED will “flicker” anytime it
detects a request for data from this controllers address. If the REC LED does not
flicker you do not have communications, See the Communications Troubleshooting
section of this manual.