Emerson FM-3 Guida alla Risoluzione dei Problemi Pagina 20

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16
“u” Low DC Bus
This fault is indicated by the display showing a “u”. Indicates a fault involving the DC
bus and voltages or with its associated components.
Potential causes for the “u” Low DC Bus fault
DC Bus falls below 96 VDC
Low AC line, below 90 VAC for greater than 50 milliseconds (3 cycles of 60 Hz)
RSR-2 module malfunction or improper installation
Repeated rapid cycling of AC power to amplifier
Removal of AC Input AC Voltage Normal
Removal of Aux Supply Powering Logic (Normal)
Notes
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