Falcon RACKMOUNT UPS PLUS FN4KRM-2TX - Manual (Page 25)

If the UPS passes the self-test,
“OK” is displayed.
If the UPS fails the self-test,
“FAIL” is displayed alternately
with an error code. Please note
the error code and contact Falcon
Service.
The UPS is now turned on and
in on-line inverter mode. Using an
AC volt meter, verify the UPS
input voltage measurement.
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