Nautel V10 User's Installation And Operation Manual

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Nautel V10 User's Installation And Operation Manual Manual pdf 114 page image

Page 5-10 V10/V7.5/V5/V3.5 Installation and Operation ManualIssue 3.5 Section 5 System Level Troubleshooting• Check for a poor connection on thecable connecting the remote interfacePWB (A44) connector J2 (exciter A) orJ1 (exciter B) to the ‘XMTR LINK’connector at the rear of the applicableexciter.• If the connection is secure, the problemis likely exciter related. Refer to the M50exciter manual for furthertroubleshooting information.Possible Associated Faults:- Exciter Comm Fail5.5.1.4 Check ExciterA Check Exciter alarm occurs when anon system inhibiting fault has occurredwithin the exciter (M50 exciter only). Thetransmitter will likely resume operation.Examples of such faults are IBOC dataloss, fan failure, high temperature, or anexciter low voltage power supply railvoltage is out-of-tolerance. Refer to theexciter’s Status and Events Log screensfor additional alarms, as an aid introubleshooting a Check Exciter alarm.Refer to the exciter’s technical manual forfurther information on the indicatedfault(s).Possible Associated Faults:- Check Exciter5.5.1.5 Exciter FaultAn Exciter Fault alarm occurs when asystem inhibiting fault has occurred withinthe exciter (M50 exciter only). Thetransmitter will be latched off. Refer to theexciter’s Status and Events Log screensfor additional alarms, as an aid introubleshooting an Exciter Fault alarm.Refer to the exciter’s technical manual forfurther information on the indicatedfault(s). Once the fault has been cleared,press the Reset button in the transmittersStatus screen to restore operation.Possible Associated Faults:- Exciter Fault5.5.1.6 Mode/Frequency MismatchA Mode/Freq Mismatch alarm occurs ifthe mode or frequency of the transmitter’sactive preset does not match (± 0.1 MHzfor frequency) the exciter’s active preset(M50 only). The transmitter is latched off.(a) Verify the active presets on thetransmitter and exciter match. Ifnecessary, adjust the transmitter’spreset (see section 3) or the exciter’spreset (see M50 manual).Possible Associated Faults:- Mode/Freq Mismatch5.5.2 IPA/PA AlarmAn IPA/PA alarm is caused by an IPA orPA fault, excessive load variation on theactive IPA output, wiring fault, or defectivecomponents on the control/display PWBor in either IPA splitter assembly. If an IPAfault occurs (5.5.2.1 - 5.5.2.4) occur, thetransmitter responds as follows:V10, V7.5, V5 or V3.5, Dual IPA:changeover to reserve IPA.V10 or V7.5, Single IPA Module: only thefaulty IPA PA [A19A3 (Q3) or A19A4 (Q4)]latches off. The remaining IPA PAcontinues to operate.V5 or V3.5, Single IPA PA: inhibitedAn IPA Shutdown alarm accompaniesthe root cause IPA alarm if the faultlatches off the IPA PA (in V10/V7.5, bothA3 & A4), and inhibits the transmitter. Seethe root cause alarm’s paragraph (5.5.2.1,5.5.2.3 or 5.5.2.4) to troubleshoot.NOTEIn dual IPA transmitters, when an IPA/PAalarm occurs, if caused by a faulty IPA, achangeover to the standby IPA is initiated.Before troubleshooting a suspect IPA,inhibit further changeover by setting Autoto N in the Changeover menu. Whentroubleshooting is complete, restore thesesettings to their factory settings.