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Emerson Energy Systems Rectifier 200I/48NT5C05C Installation and User Manual
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.
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