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0MLMHTK65RUENUB
Procedure b)
The bypass line is out of the acceptable range; the following message is showed on the display
panel:
BAD BYPASS VOLTAGE or SWBY OFF and the green LED 1 will flash
1.
Open all the switches on the UPS (SWIN, SWOUT, SWBY and the battery cabinet circuit
breaker/disconnect). The control panel will remain off.
2.
Before closing switches SWMB and connecting the loads, ensure that both the frequency and voltage
of the mains supply are sufficient to power the connected loads.
After carrying out the above operations, personnel must wait at least ten minutes for the
capacitors to discharge before working on the inside of the UPS.
At the end of the maintenance operations, restart the UPS by following the instructions in the section on START-
UP PROCEDURE (see page 49) and then open SWMB (if closed).
The UPS will return to NORMAL OPERATION.
Insertion and removal with UPS’s operating (hot swap)
The hot insertion and removal of the UPS can only take place if the system is configured with the
RJ45
female/RJ45 female shielded adaptor cable
(as shown in the figures below).
The hot insertion and removal of the UPS makes technical support easier and improves the reliability of the system.
With this procedure it is not necessary to shut down all the UPS’s in order to add or remove a unit.
Hot insertion and removal can only be done on systems comprising UPS’s with the following characteristics:
The UPS system must be prearranged with a distribution panel (for power connections)
The UPS system must be prearranged with a RJ45 female/RJ45 female shielded adaptor cable (not provided with
the UPS)
.
All the UPS’s in the system must have the same firmware version.
Example of hot insertion
A) UPS parallel cable type
RJ45
B) RJ45 female/RJ45 female
shielded adaptor cable
UPS
BYPASS CABLE
II - Insert the new UPS
(power connections in the
distribution panel) and keep it
switched off.
UPS 3: SW1 cont position.
III - Remove adaptor B and
insert the new UPS instead of
the adaptor
.
Now switch on UPS 3 (the added UPS).
UPS 3
A
UPS 1
A
UPS 2
A
I
II
III
B
UPS 1
UPS 2
UPS 3
UPS 1
UPS 2