45
FAULTS AND ALARM SIGNALS
S
IMPLE INTERRUPTION OF PARALLEL CONNECTION
In the event of a single interruption of the parallel communication connection (signal bus), all units will continue to operate and
supply power to the load. The display will show “PARAL. CONNEC. OPEN.”
Restoring the connection will restore normal operation and the open connection will no longer be displayed
.
P
ARALLEL CONNECTION INTERRUPTION WITH ISLAND FORMATION
If parallel communication connection (signal bus) is cut off in two points and two separate systems are formed, the island with the
largest number of units will continue to feed the load, while the other one will be disconnected.
The display will show the message PARALLEL BUS SEPARATION.
When at least one connection is restored, the isolated units will re-enter the parallel system and will contribute to feeding the load.
F
AULT
FAULTS are anomalies that do NOT cause UPS shutdown
The “FAULT” column of the table lists messages that can show up on the UPS display
.
FAULT
CAUSE
SOLUTION
PARALLEL LINK OPEN
code F45
No data bus signal for ring closure.
Close ring
Check START/CONT switch on parallel
card faceplate (one UPS should be in
START, all the others in CONT)
PARAL. R_BYP. LINE FAULT
code F46
BYPASS line (data bus) transmitter
and/or receiver breakdown.
Replace parallel card and/or DSP card.
PARAL. SYNC. LINE FAULT
code F47
UPS is master and there is a SYNC line
(data bus) transmitter and/or receiver
breakdown.
Replace parallel card and/or DSP card.
FAULT ON REMOTE UNIT
code F48
Alarms occurring on one or more
remote UPSs.
Check messages on remote UPSs.
DIFFERENT FIRMW. VERSION
code A47
The firmware revision is not the same
on all UPSs
Update the firmware of all UPSs using the
latest version.
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