APC 9000 User Manual
34006452EN/AC
- Page 36
8. Maintenance
8.1 Maintenance configuration
Single-unit or single modular UPS
(figure 25)
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
- 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.
Multi-bypass modular UPS
(figure 26)
Note:
It is strongly advised to call on our after-sales support department for these operations.
During maintenance, the UPS must be isolated
from Mains 1 and 2, the battery and the load.
from Mains 1 and 2, the battery and the load.
– inverter isolation
Proceed in the following order:
– shut down the inverter (press the "inverter off"
– shut down the inverter (press the "inverter off"
button for
3
seconds),
– close bypass switch Q3BP,
– open isolating switches Q5N, Q4S, QF1 and
– open isolating switches Q5N, Q4S, QF1 and
Q1.
The UPS is powered down once the capacitors
have discharged (a few minutes);
have discharged (a few minutes);
– start-up
Following servicing, proceed in the following
order:
order:
– close switch Q1, then after approximately ten
seconds, switches QF1, Q5N and Q4S,
– open bypass switch Q3BP,
– open bypass switch Q3BP,
start the inverter (press the "inverter on"
button
).
Fig. 25
Prior to servicing a given UPS, it must be isolated
from Mains 1, Mains 2, its battery and the load
outputs of the other UPSs (in this case, never
outputs of the other UPSs (in this case, never
operate the Q3BP switches in the units).
– isolate the UPS
Proceed in the following order:
Proceed in the following order:
– shut down the inverter (press the "inverter off"
button
for three seconds);
– open isolating switches Q5N, QF1, Q4S and
Q1 in the unit.
The UPS is de-energised once the capacitors
have discharged (a few minutes).
have discharged (a few minutes).
– start-up
Once servicing is completed, proceed in the
following order:
following order:
– close Q1, then QF1, Q4S and Q5N;
– start the inverter (press the “inverter on”
button
button
).
Fig. 26
Q1
Q5N
QF1
Q3BP
Q4S
load
battery
inverter
mains 1
rectifier-
charger
static switch
mains 2
7
6
Q1
Q5N
QF1
Q3BP
Q4S
Q1
Q5N
QF1
Q3BP
Q4S
Modular UPS 2
Modular UPS 1
load
battery
inverter
mains 1
rectifier-
charger
static switch
battery
inverter
mains 1
rectifier-
charger
static switch
mains 2
mains 2
7
6