How to find a system trouble on the DS7090

[#1]

  Enter a valid code #87 to display the Trouble, and observe the zone lights: 

1. Light 1 = AC power failure
2. Light 2 = Low or missing battery
3. Light 3 = Communicator failed to communicate
4. Light 4 = AUX power shorted
5. Light 5 = Internal system fault EEPROM
6. Fire light = Internal system fault EEPROM, RAM

After correcting the problem, reset the flashing power light by entering a valid pass code # 87 *.