Nautel V10 User's Installation And Operation Manual

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Nautel V10 User's Installation And Operation Manual Manual pdf 118 page image

Page 5-14 V10/V7.5/V5/V3.5 Installation and Operation ManualIssue 3.5 Section 5 System Level TroubleshootingNOTEFollowing each troubleshooting action,press Reset. If the alarm cannot be reset,continue troubleshooting. If transmitteroperation is restored to the desired powerlevel, the fault has been cleared.In the Module Status screen (see below),monitor each RF power and IPA module’sparameters for out-of-tolerance values orindicated (flashing) failures:5.5.2.5.1 Module OfflineA communications problem existsbetween the control/display PWB (A43)and the suspect RF power or IPA module.Troubleshoot as follows:• For IPA modules, the GUI may displayIPA A Missing (V10/V7.5), IPA BMissing (V10/V7.5), or IPA Missing(V5/V3.5).• Ensure the IPA or RF power module isinstalled properly. Switch the applicableswitching power supply to STANDBY.Slide the module slightly forward andpush back on it to engage its blind-mateconnectors. Switch the applicableswitching power supply to ON. PressReset. If the module remains ‘Offline’ or‘Missing’, there may be a problem withits interconnect PWB [A17 (IPA A), A18(IPA B), A23 (A) - A30 (H) for V10; A17(IPA A), A18 (IPA B), A23 (A) - A25 (C),A27 (E) - A29 (G) for V7.5; A17 (IPA A),A23 (A) - A26 (D) for V5; or A17 (IPAA), A23 (A) - A25 (C) for V3.5] or withthe ribbon cable connecting the moduleto the control/ display PWB.• Verify the dipswitch settings on theapplicable module’s interconnect PWB.Refer to Section 3 for details ondipswitch settings.• If all dipswitches are set properly, theproblem is likely related to the powermodule interface PWB (A5) of theapplicable module, or with the control/display PWB (A43).5.5.2.5.2 High Module TemperatureThe temperature in an RF power or IPAmodule exceeds 100°C due to a failed fanor a blockage in the module's normal airflow. The associated switching powersupply module(s) will be inhibited,therefore reducing the total RF outputpower or, for an IPA module, causing thetransmitter response described in 5.5.2.NOTEWhen testing for voltage on fanconnectors, the transmitter’s RF powerstage must be enabled (RF On).(a) Check airflow at the front of the RFpower or IPA module and check thecooling fan for blockage. If the fan isfunctioning properly (compared to theother fans), a problem may exist withthe failure detection circuitry on thepower module interface PWB (A5).(b) Measure voltage between pin 1 (+) andpin 3 (-) of the suspect fan’s connector(B#P1) while connected to itsassociated interconnect PWB.• If the voltage is between 47 V and 53 V,the fan is probably defective and shouldbe replaced (see 5.6).• If the voltage is not between 47 V and53 V, check the voltage betweenE1 (+) and E2 (-) of the PS interfacePWB [A2 (IPA A), A3 (IPA B, V10/V7.5only), or A4 (A) - A11 (H) asapplicable] associated with the IPA orRF power module. If the voltage ispresent, a wiring defect may exist. If novoltage is present, check for a hot PTC[RT1 (A) - RT8 (H) as applicable, RT9(IPA A) or RT10 (IPA B, V10/V7.5only)] on the fan distribution PWB(A12). If the PTC is hot, suspect afaulty fan or wiring defect.(c) If a fan is defective, replace it with afunctional fan (see 5.6).