46
L
OCKS
LOCKS are anomalies that cause UPSs to switch off
The first column of the table lists messages that can show up on the UPS display.
LOCK
CAUSE
SOLUTION
PARAL. SYNCHRON. ERROR
code L32
The UPS is slave and synchronisation with
the master is greatly disturbed or there was
a prolonged absence of the sync signal
(SYNC).
Check correct system installation: type
and length of data bus cables, parallel
card terminal resistance DIP-switches.
Switch UPS or the whole system off
and on again.
PARAL. SYNC. LINE FAULT
code L33
The UPS is slave and there is a fault in the
transmitter and/or receiver of the SYNC
line (data bus).
Replace parallel card and/or DSP card.
PARALLEL BUS DIVISION
code L45
The UPSs in operation have been divided
into two non-communicating groups due to
disconnection of the data bus cables and
this UPS forms part of the minority group
(or the group with the least number of
UPSs or, in case of equal number of UPSs,
without the master).
Note:
With the ring open, switching some UPSs
off (at the same time) is seen by the others
as dividing the system into two groups.
Reconnect cables
(the UPS must see the master again, or the
whole data bus ring must be restored).
PARAL. COMMUNICAT. FAULT
code L46
Communication on the data bus is greatly
disturbed.
Check correct system installation: type and
length of data bus cables, parallel card
terminal resistance DIP-switches.
PARALLEL BOARD FAULT
code L47
Fault at parallel card power section or card
itself was connected or disconnected with
UPS switched on.
Replace parallel card or switch off UPS and
switch back on in case of tampering
LOCK ON REMOTE UNIT
code L48
Blocks have occurred on one or more
remote UPSs.
Check messages on remote UPSs.
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