Nautel XR12 Installation Manual

Also see for XR12: Troubleshooting manual Operation and maintenance manual Preinstallation manual

XR12 Installation Manual Control and monitoringIssue 3.0 2009-07-15 Page 9-3Total power limitThis fault is triggered when the product of the B+ (dc) voltage and the dc current is greater than29 kVA (the limit set in software).• This fault causes an immediate cutback, but not a shutback.Exciter faultsMod driver fault AThis fault is reported to the microcontroller only if exciter A is selected. If the exciter transferfunction is set to auto, then the microcontroller will attempt a changeover to exciter B. If it cannot, orif the exciter transfer function is set to manual, then this fault will cause a shutback.Mod driver fault BThis fault is reported to the microcontroller only if exciter B is selected. If the exciter transferfunction is set to auto, then the microcontroller will attempt a changeover to exciter A. If it cannot, orif the exciter transfer function is set to manual, then this fault will cause a shutback.Auto changeoverThis event is caused by a fault in the active exciter when the exciter transfer function is enabled (set toauto). These faults cause exciter changeovers: Mod Driver Fail A/B, RF Driver Fail, or PDM DriveFail.This fault causes the Changeover LED on the transmitter’s front panel to light. It will remain lit untilit is manually cleared. No further auto changeovers are possible until the alarm is cleared.• The Auto changeover alarm can be cleared remotely by re-selecting the active exciter, orlocally by using the transmitter’s GUI Preset screen.RF driver faultThis fault indicates a problem with the RF drive on the current exciter. If the exciter transfer functionis set to auto, then the microcontroller will attempt a changeover to the other exciter. If it cannot, or ifthe exciter transfer function is set to manual, then this fault will cause a shutback.PDM drive faultThis fault indicates that the PDM drive has stopped functioning. If the exciter transfer function is setto auto, then the microcontroller will attempt a changeover to the other exciter. If it cannot, or if theexciter transfer function is set to manual, then this fault will cause a shutback.