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Helios Rectifier 25/48NT5C06D Installation and User Manual
6. Troubleshooting
Alarm indication
RFA fault
Table 9 - System fault diagnosis
Fault symptom Possible causes
No AC input or input out of bounds.
No AC input or input out of bounds.
AC Input/DC output circuit breaker is open.
Rectifier has received a HVSD signal from the
controller.
An internal high voltage shutdown (HVSD) has
occurred. The internal High voltage shutdown point set too
low (below float or equalize setting).
Excessive impedance in one or both sense leads.
The cooling fan is failed.
DC circuit breaker is open.
A thermal shutdown has occurred.
Defective unit.
Excessive ambient air temperature.
RFA
Air inlet/outlet blocked, clogged air filter.