Honeywell VISTA-20P Frequently Asked Questions

Why Did My Panel Report Code E339 "Power on Reset"?
A Honeywell Panel will report the message E339 "Power on Reset" when its communicator has been reset. The communicator for a Honeywell System will reset whenever programming changes are sent to the module or when the module is powered off and then back on. Learn more about the E339 message.
Added:

Why Did My Panel Report Code R903 "Complete FW"?
A Honeywell VISTA Panel will report the R903 "Complete FW" message after the firmware update process for the AlarmNet communicator has been completed. This message indicates that the process was completed successfully. Learn more about the R903 Complete FW message and what it means.
Added:

How Do I Replace the Battery in My Honeywell Security System?
Replacing the battery for a Honeywell Security System is actually a very simple process. However, some minor tools will be required. The steps will also vary depending on the type of Honeywell System that is being used. Learn how to replace the battery for a Honeywell Security System.
Added:

How Many Hardwired Zones Are Available on a VISTA 20P?
The Vista-20P has eight hardwired zones. Only Zone 1 can use 2-wire smokes. Zones 2 - 8 can be doubled using a special resistor setup for a total of 15 hardwired zones. With up to five Honeywell 4219 Zone Expanders, the panel supports up to 48 hardwired zones. Learn more about the VISTA 20P.
Added:

Are Wired or Wireless Security Systems Better?
In terms of functionality, wired systems can do virtually everything wireless systems can. However, wireless systems are easier to set up, and they require fewer add-ons. this makes wireless systems better for new users. Learn more about the differences between wired and wireless security systems.
Added:

Where is the VISTA-20P Bell Supervision?
The Honeywell Vista-20P offers supervision of the bell circuit in various ways on different revisions of the control panel. In early versions, the feature was always enabled, with the option to enable or disable supervision being introduced in later versions. Read on to learn more.
Added:

What is a Telco Fault?
When a Honeywell Panel is experiencing problems with its telephone communication, a telco fault message might be displayed. The message can be displayed on any Honeywell Panel that uses POTS communication. Fortunately, there are ways to clear this error. Learn more about telco fault errors.
Added:

Honeywell LYNX Touch & LYNX Plus vs. VISTA systems
Check out our breakdown of the differences between the LYNX Touch and Plus wireless alarm panels vs. VISTA wired security systems
Added:

What Resistance Should Security System Contacts Have?
The type of resistance used by a security system contact depends upon the type of security panel that is being used. The majority of the hardwired security systems offered from Alarm Grid use 2k resistors. However, there are some exceptions. Learn more about resistors and why they are used.
Added:

Can I Change the Time on My VISTA-P System w/o Using the Master Code?
You can use your Master Code or the Installer Code to change the date and time on a Honeywell VISTA P-Series System. By using one of these codes plus the [#63] command, you can change the date and time on your Honeywell VISTA. Learn more about adjusting your VISTA panel's date and time.
Added: