What Happens if a PROA7 or PROA7PLUS Loses AC Power?

The PROA7 and PROA7PLUS behave in exactly the same way during an AC power loss event. The touchscreen goes dark when unused, and both WIFI and cell communicators power off. This is done to conserve battery life. The communicator will power up only to report signals, not for remote access.

The information in this FAQ applies to the Honeywell Home PROA7 and PROA7PLUS as well as the Resideo PROA7C and PROA7PLUSC. All four (4) variations of this panel behave in the same way during an AC power loss condition. The only difference between Honeywell Home branded panels and Resideo branded panels is in the name displayed on the front of the system. All the other differences you can read about in this comparison FAQ.

The Resideo PROA7PLUSC (Left) and the Honeywell Home PROA7PLUS (Right):

The Honeywell Home PROA7 (Left) and the Resideo PROA7C (Right):

When a PRO Series panel loses its primary power input, initially not much will change. If the input power voltage drops below 3.9VDC, an AC Loss message will be displayed on the touchscreen and logged to the system's event log, and a single beep will be heard every 30 seconds, except during Quiet Time.

The system has a feature called Quiet Time, which spans from 10:00 p.m. to 8:00 a.m. each day. This feature is always enabled. During Quiet Time, certain trouble conditions will display, but will not cause an audible alert. These conditions are; communicator trouble, system low battery, RF transmitter low battery, RF Jam, AC Loss, and secondary touchscreen keypad trouble. If one of these conditions occurs during Quiet Time, and the condition has not cleared by 8:00 a.m., then at that time, the trouble alert will begin to sound.

If the power loss lasts more than five (5) minutes and no one touches the panel's screen during that time, the touchscreen will power down to conserve battery life. Touching the screen will bring it back to life, and it will stay lit until no one has touched it for approximately fifteen seconds, then it will go dark again.

Also at the five (5) minute mark, the WIFI and cellular communicators (if installed) will power down. They will power back up only to report an outgoing signal. They will not power on to facilitate a remote control session through Total Connect 2.0. So, during extended power outages, users will not be able to access the system remotely using TC2.

If enabled, the system will report the AC Loss condition, but this report is randomized with an up to four (4) hour delay. This is done to prevent multiple systems affected by a widespread power outage from all reporting at the same time. The same logic applies to end-user notification via Total Connect 2.0. The end-user notification won't go out until the AC Loss report does. In some cases, the user may need to verify if a power outage occurred by checking the panel's event log.

When power is restored, if the screen is dark, it will come back on and the AC Loss display will clear automatically without a disarm sequence being entered. If the AC Loss condition restores before the central station report and end-user notification are sent, then neither the AC Loss nor the AC Restore will be reported. In this case, to verify that the AC Loss condition occurred, check the panel's event log.