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critical Orbit
Error Code NO AC
Power failure — display shows 'NO AC' indicating loss of AC power. No watering will occur.
? What Causes This
AC power loss or loss of connection to power source.
✓ How to Fix It
- Check that the transformer is plugged into a working outlet.
- Verify AC power is available at the installation site.
- Restore power to resume operation.
Source: page 14 of the official manual
From the manual
This error code appears in:
Orbit 27894 Sprinkler Timer