ℹ
info ADT
Status Chime mode (3 beeps)
Indicates the CHIME function is active; alerts user when perimeter zone is open.
? What Causes This
Enabled chime feature on system disarmed status.
ⓘ What This Means
Ensure only intended areas are open during chime mode activation.
Source: page 23 of the official manual
From the manual
This error code appears in:
ADT Safewatch Pro 3000