ℹ
info Honeywell
Status One short beep (not repeated)
System has been disarmed, an arming attempt was made with an open zone, or bypass verification has been completed.
? What Causes This
Normal system disarm operation, attempted arm with faults, or bypass zone verification.
ⓘ What This Means
If arming attempt failed due to open zones, close or bypass the open zones and try again. Single short beeps are normal confirmations of system operations.
Source: page 50 of the official manual
From the manual
This error code appears in:
Honeywell Vista-20P Security System