If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing the UP arrow, DOWN arrow and move the SYSTEM switch from OFF to HEAT at the same time. See similar questions...

This normally means that electrical power has been removed from the system and the battery has been exhausted. Check all of the circuit breakers. If none are tripped and you have power in your home service will be required. See similar questions...

Ensure that the power adaptor is fully plugged into the electrical outlet, and that the outlet is supplying power. See similar questions...

A keypad will generally display not ready when a zone is open or an alarm activation is being stored in the memory of the system. See similar questions...

An alarm panel will display "no ac" when the system has lost the main electrical supply. The outlet should be checked to verify that it is operational. If the outlet is working properly, a service call to ADT Monitoring Centre (dial 021-776 6302) will be needed. See similar questions...

The top display of the 8870 thermostat will display two types of messages, permanent and temporary messages. Permanent messages scroll continually while temporary messages flash. Temporary messages need to be reset to be removed. Examples of use would be e-mail alert or stock quote. See similar questions...

quot;DC" will appear anytime the download software has been used to access the control panels programming. See similar questions...

Your system has an integrated message center. Press function key (#) and then press (3) to listen to your message. See similar questions...

In most cases DVD X Point? will handle a change in display resolution properly, but it is best to avoid switching resolution if the application is busy. return to top See similar questions...

The radio has had 3 incorrect security codes entered & is now in lockout mode. For recent model radio's leave 1 hour (some radio's require ignition key to be on accessories). For older model radio's, remove power to radio by either unplugging radio or disconnecting the negative lead on the battery for 1 hour. See similar questions...

The "Stay" mode also allows for Entry / Exit delay times. If no delay is needed, arm the system in the "instant" mode. This will not allow any Entry time. See similar questions...

Any time a zone is faulted it will display on the keypad. This could mean a door or window is open or there may be movement in the area of a motion detector. The system cannot be armed at this time. The fault must be cleared to set the alarm. See similar questions...