Nautel V10 User's Installation And Operation Manual

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Nautel V10 User's Installation And Operation Manual Manual pdf 128 page image

Page 5-24 V10/V7.5/V5/V3.5 Installation and Operation ManualIssue 3.5 Section 5 System Level TroubleshootingNOTEIn a V10/V7.5, an IPA changeover affectsboth the IPA module and its associated IPAPS (i.e., they are ganged together). In aV5/V3.5, however, the IPA PA and IPA PShave independent changeover functions.• IPA fault (dual IPA V10/V7.5 only): AnIPA changeover can occur if the activeIPA [A (A19) or B (A20)] fails due to anIPA related fault, such as IPA Q3/Q4Forward Low alarm. See theapplicable paragraph under IPA/PAalarm (see 5.5.2) to troubleshoot.• IPA PA fault (dual IPA PA V5/V3.5only): An IPA PA changeover canoccur if the active IPA PA [A (A19A4)or B (A19A3)] fails due to an IPArelated fault, such as IPA ForwardLow alarm. See the applicableparagraph under IPA/PA alarm (see5.5.2) to troubleshoot.• IPA PS fault (dual IPA PS V5/V3.5only): An IPA PS changeover canoccur if the active IPA PS [A (U1) or B(U2)] fails due to an IPA PS relatedfault, such as PS Temp alarm. See theapplicable paragraph under PowerSupply alarm (see 5.5.6) totroubleshoot.• A Fan PS fault (dual fan PStransmitters only): A fan PSchangeover can occur if the active fanPS [A (U13) or B (U14)] fails due to arelated fault, such as Fan PS Failalarm. See the applicable paragraphunder Low Voltage Power Supplyalarm (see 5.5.4) to troubleshoot.To reset the Changeover alarm and clearthe front panel alarm lamp (off):• In the Changeover menu, toggle theindicated Main module [A or B ofexciter, IPA (V10/V7.5), IPA PA (V5/V3.5), IPA PS (V5/V3.5), or Fan PS] tomatch the current Active moduleindicated in the Status bar (A or B).5.5.8 External Alarms5.5.8.1 Interlock Open AlarmAn Interlock Open alarm occurs if thetransmitter interlock is open. Check theinterlock connection at remote interfacePWB (A44) TB1-1 and 2. If intact, checkall interlock switches. Otherwise, it may bea problem with the interlock circuitry foreither the remote interface PWB orcontrol/display PWB.5.5.8.2 Remote PWB Offline AlarmA Remote PWB Offline alarm occurs ifthe control/display PWB (A43) is notreceiving communications from theremote interface PWB (A44). If the remoteinterface PWB is receiving data updatesfrom the control/display PWB, the ValidData Status output (J4-26) on the remoteinterface PWB is a current-sink-to-ground.If the remote interface PWB is notreceiving communication from the control/display PWB, Valid Data Status outputswitches to an open collector. Check thecabling between the control/display PWBand the remote interface PWB. Check thesupply voltages applied to both PWBs.5.5.9 EEPROM AlarmsIf an EEPROM Fail Cal, EEPROM FailThresh, EEPROM Fail Meters, orEEPROM Fail Presets alarm is displayedon the GUI’s Events Log, enter theassociated GUI screen [Calibrate Meters(see 3.6.12.3) for EEPROM Fail Cal,Setup Thresholds (see 3.6.12.6) forEEPROM Fail Thresh, Meters Presets(see 3.6.8) for EEPROM Fail Meters andPresets (see 3.6.4) for EEPROM FailPresets) and press Save. Contact Nautelif the problem persists.5.6 FAN REMOVAL/REPLACEMENTWhen a fan is found to be defective,remove it and replace it with a functionalfan as follows:5.6.1 RF Power Module FanIf replacing an RF power module fan,perform the following steps: