!
error Garrison
Error Code Red LED constantly on, constant alarm (after two minutes)
Indicates tamper resist feature is activated and alarm has been unplugged.
? What Causes This
This CO alarm with its tamper-resist engaged has had power disconnected from the wall outlet or plug.
✓ How to Fix It
Plug the unit back into an AC outlet to deactivate this condition, or disable the tamper feature if desired.
Source: page 15 of the official manual
From the manual
This error code appears in:
Garrison 043 6119 2