Emerson 200I/48-NT5C05C Troubleshooting, Diagnosing system faults Fault symptom Possible causes

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7. Troubleshooting

Table 16 - Diagnosing system faults

Fault symptom		Possible causes

The RFA LED is lit.	•	No ac input or input is out of bounds ( ac ON
		LED is extinguished ).
	• AC Input / dc output circuit breaker is open.
	• The rectifier has received an HVSD signal from
		the controller, or a TR signal is present.
	• An internal high voltage shutdown ( HVSD ) has
		occurred.
	• Two cooling fans or fuses have failed.
	• The inrush fuse has blown.
	• The dc circuit breaker is open.
	• A thermal shutdown has occurred.
	• Ambient air temperature is high.
	• Air inlet / outlet air is blocked, or the air filter is
		clogged.
	• A rectifier is in 'Start Time Delay' mode and the
		RFA will cease when the required time delay has
		elapsed.
	•	Defective rectifier.
The HVSD LED is lit.	•	The internal high voltage shutdown point is set
		to low ( below the float or equalize setting ).
	• The controller triggered a remote HVSD.

		− continued−

Emerson Energy Systems

Rectifier 200I/48 NT5C05C Installation and User Manual

Image 53

Contents Helios Modular Switch Mode Rectifier 200I/48 NT5C05C Page Emerson Energy Systems Page Publication history This page is left blank intentionally Contents List of Tables List of ProceduresList of Figures Ac female plug in a 1200 a cabinet This page is left blank intentionally Purpose of this manual General informationTypical mounting in a cabinet or frame Models and mounting configurationsMechanical and electrical specifications SpecificationsOperation specifications and ambient conditions Conditions Ambient conditions for the rectifier OperatingTransportation Storage conditionsOutput voltage Mechanical specifications of the NT6C43CB 1200 a cabinetAmbient conditions of a 1200 a cabinet Mounting configurations InstallationTools and test equipment Protecting the premisesPreventing damage caused by over-tightening Personal safety and protecting the equipmentPreventing personal injury Optimizing the life of the equipmentProtecting against electrical shocks Installing in a cabinet Installing in a frameProcedure 1 Installing the rectifier in a frame Step Action Short circuit hazardAnchoring the cabinet Procedure 2 Installing a rectifier in a cabinet Step ActionInstalling the rectifier Cabling and connectingConnecting the dc output terminals to the busbars Electrical connections should meet standards Connecting ac to the rectifiersHazardous potentials Cabling ac the NT5C05CA / CB rectifiers Connecting ac to the rectifier NT5C05CC Controller NT NT6C25BA or NT6C25BB Connecting the control signalsFunction Input/ Output Pin assignment for connectors J7 to J12Monitoring of the shunt current Pin assignment for connector J13 Function Output circuit Functional descriptionOverview Input circuit Output capacitors Monitoring and control circuitsDescription of the front panel Breakers DC circuit breaker AC breakerFront panel controls and LEDs Switches, controls and LEDsFAN ALM fan failure alarm CL current limit indicatorFront panel LEDs AC on ac voltage monitoringSEN Fail sense fail alarm RFA rectifier failure alarmLocal and remote adjustments and controls Hvsd high voltage shutdownDesignation Description Switches DescriptionRectifier input / output signals to the controller Remote equalize control EQL Volt / AMP digital meter switchSlope sharing SLS Rectifier parallel operationForced sharing FS Remote Hvsd Local and remote Hvsd resetSwitch Position Delay SEC Setting the start-up delayRemote on / OFF control TR Start up delay DIP switchControl signals on connector P1 CB OFF NC This page is left blank intentionally Operation Standard settingsStandard settings for the rectifier Parameter Setting Adjusting the high voltage shutdown Hvsd Starting up and adjustingProcedure 9 Starting up the rectifier Step Action Verifying the current limit Adjusting the equalize voltage EQLAdjusting the slope share Adjusting the forced load sharing Replacing the fan unit MaintenanceReplacing the air filter Re-assembling Calibrating the Volt / Amp MultimeterPreventing short circuits Remotely Resetting the rectifier after an Hvsd high voltage shutdownThis page is left blank intentionally Diagnosing system faults Fault symptom Possible causes TroubleshootingTroubleshooting Part Number CPC Appendix a Replacement partsAppendix a Recommended Replacement Parts Country Prefix Appendix B Technical service assistanceLocal toll-free prefixes Caribbean and Latin America Middle-East Cala Toll-free technical assistance numbersUnited States Canada Europe Asia and the Pacific Abbreviations and acronyms RFA Page Helios Modular Switch Mode Rectifier 200I/48 NT5C05C