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info Honeywell
Status Not Ready
The burglary portion of the system is not ready for arming due to open protection zones.
? What Causes This
One or more burglary protection zones are open or faulted.
ⓘ What This Means
Press the READY key to display all open zones. Close or bypass the open zones. The READY indicator will light when the system is ready to arm.
Source: page 10 of the official manual
From the manual
This error code appears in:
Honeywell Vista-20P Security System