Here is what you do :
Approach the keypad. Press * 2 The Zone that lights up indicates the trouble. If its Zone 1, then press "1" again. If its one of the other Zones see the chart :
Here are the Zone codes :
Zone 1 - Service Required
light 1) low battery
light 2) bell circuit trouble
light 3) general system trouble
light 4) general system tamper
light 5) general system supervisory
light 6) not used
Zone 2) AC failure
Zone 3) Telephone Line Monitoring
Zone 4) Failure to communicate
Zone 5) Zone Fault
Zone 6) Zone Tamper
Zone 7) Device Low Battery (if you are using wireless)
Zone 8) Loss of system time.
I am willing to bet you have 2 troubles. I think its the loss of system time. You must program the time in the system to work properly. And, I think you have TLM trouble. The manual explains how to disable the TLM, OR, run a phone line to the system so that it "see's" a dial tone.
End of line resisters are optional for this system. It can be disabled through programming if EOLs have NOT been used.
Please let me know how you make out.