Commissioning instructions64 4188-856_issue 7_07/15_Generic Vigilon (Compact + VA) Comms.Loop circuit testsPositive line break testA positive line break test should be carried out at thisstage:¨ Disconnect the +ve loop connection at one Endof a loop circuit.The display should read:Wiring changed - split at card xnumber y on loop z" A single +ve line break should notcause the loss of any part of the system.¨ Reconnect positive (+ve) line to clear the fault.¨ Repair the loop using the [Repair] function thepanel, see page 62.Earth fault testEarth fault tests should be carried at this stage:0V-line earth fault test¨ Connect the 0V line to the earth of the control panel enclosure.This may have to be sustained for up to 1 minute for the fault to bedetected. The display should read:Earth Fault¨ On removal of earth fault the display should read:Earth Fault cleared+ve line earth fault test¨ Now connect the +ve line to earth via a 10K ohm resistor. Thismay have to be sustained for up to 1 minute for the fault to bedetected. The display shows an Earth fault message as above andafter restoration a cleared message is displayed." If the resistance between Earth and Loop +ve is in theorder of a few ohms then this will be registered as a ‘short circuit’.Type of earth faultInterrogate the [PSU] readings using the [Test/Eng] menuto establish the type of Earth fault.Type of Earth fault Earth (Ear) readingNo earth fault around 60+ve line and earth greater than 75-ve line and earth less than 40¨ At the end of the test operate the [Repair]function at the panel.LOOP CABLEBOARDTERMINALSBOARDPANELenclosureL1 0V10KresistorL1 0V0V (-ve)LINEEARTHFAULTTESTL1 (+ve)LINEEARTHFAULTTESTL1 0VBOARDTERMINALSBOARDPANELenclosureL1 (+ve)LINEGROUNDBREAKTESTLOOP CABLE
