Baldwin Boxall OmniCare Installation Manual
                                                                                                      | |
Contents
| 
OmniCare EVC SystemInstallation & Commissioning ManualOmniCare issue 1 73COM MUNICATIONS6.2 F AULT F INDING P ROCEDURES FORR EMOTE U NITSIf during Commissioning an “Open Ended” loop (i.e. onlyconnected at the “A” termination on the Control Panel) theRemote Units are not all detected then the following procedurescan help to identify and locate the fault(s).6.2.1 Perform a 0V Continuity CheckWith the mains and one end of the Loop disconnected at theControl Panel ensure the 0V cable has continuity around the loopbetween the “A” and “B” ends of the circuit.If the 0V cable does not have continuity around the loop then thismust be investigated and resolved before attempting toCommission the system again.It may be necessary to check the continuity of the loop “point topoint” to locate the fault. It is possible to determine the locationof a break in the 0V cable by linking one end of the 0V cable toEarth, and then checking the resistance between 0V and Earth ateach Remote unit in turn along the loop. When 0V is no longerconnected to Earth the location of the break is identified.6.2.2 Check Terminations on Remote UnitsThe majority of problems encountered during commissioning aredue to poor, loose or incorrect terminations on Remote Units.C A U T I O NThe OmniCare EVC System Remote Units can be damaged ifeither of the following situations occur:• If Power is connected across the Data pair,• If Power is reversed i.e. 0V and +V swapped.N OTE: The 0V cable is the only cable that should have continuity aroundthe loop. |
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine