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34 - E-51028230XT/BG
Maintenance
Maintenance
configuration
Single-UPS unit or UPS in
"ECO" mode
See figure 24. During maintenance, the
UPS must be isolated from the normal
and bypass AC source, the battery and
the load.
◗ UPS isolation
Proceed in the following order (see
figure 25):
◗ ◗ shut down the inverter (press the
"inverter OFF" button
9 for three
seconds),
◗◗ close bypass switch Q3BP,
◗◗ open isolating switches Q5N, Q4S,
QF1 and Q1.
The UPS is powered down once the
capacitors have discharged (a few
minutes);
◗ start-up
Following servicing, proceed in the
following order (see figure 26):
◗◗ close switch Q1, then after
approximately ten seconds, switches
QF1, Q5N and Q4S,
◗◗ open bypass switch Q3BP,
◗ ◗ start the inverter (press the "inverter
ON" button
8 ).
Caution
◗ work should be carried out in
accordance with applicable safety
regulations;
◗ to avoid interrupting the load, the
various switching operations must be
carried out in the correct order.
Operations are explained in diagrams
placed next to the switches;
◗ the system cubicle is only partially
powered down. The load is still
supplied via the bypass AC source and
switch Q3BP.
Fig. 24
Fig. 25
Q1
Q5N
QF1
Q3BP
Q4S
AB
C
D
1
2
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Q5NQ1 Q4S
3
1
2
1
0
Q3BP
1
0
1
0
1
0
1
0
5
4
6
QF1
0
I
Fig. 26
OFFOFF
1
0
1
0
1
0
1
0
1
0
1
0
Q5NQ1 Q4S
3
1
2
Q3BP
1
0
1
0
5
4
6
1
0
1
0
1
0
1
0
OFF
1
0
QF1
0
I