Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 124)

Section 4 Auto-Zone Basic
4-22 Start-Up and Troubleshooting
Some zones are communicating but others are not:
• Is the Zone Manager set for the correct number of zones?
• Are the Zone Controller address switches set correctly? See the addressing chart.
• Are the Zone Controllers powered? Check 24VAC to the controllers.
• Is the REC LED on the missing Zone Controller “flickering”? See Zone Control-
ler introduction for location of the REC LED.
• Is the SCAN LED blinking an error code? See the BLINK CODE chart.
• Are COMM LOOP voltages correct at the missing unit? See the COMM LOOP
troubleshooting guide.