Section 4
Auto-Zone CV & CV-EX
4-18 Start-Up and Troubleshooting
Blink Codes
The CV Controller uses an on board LED to indicate various diagnostic conditions
during powerup and operation. The CV Unit LED is labeled “COMM”. Starting with
power up the LED blink codes are as follows:
• Off for five seconds
• SCAN LED blinks the board address (Address 14 = 14 blinks)
• Five second pause
• Twenty second time delay - LED blinks twenty times
• Status code is repeatedly blinked every ten seconds to indicate controller
status:
Priority No. of Blinks Status
Lowest 1 Normal Operation
- 2 Override Active
- 3 Bad Zone Sensor
N/A 4 Not Used for this System
Highest 5 Communication Failure
Table 4-1: Diagnostic LED Blink Codes
Only the highest priority failure code will be shown. You must correct the highest
priority alarm before other problems will be indicated.
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