1
5
9
3
7
11
2
6
10
4
8
12
13
14
1
2
A
A
B
B
3
5
4
6
Output
Manual
Bypass
Bypass
Input
Main
Input
Q2
Output
Manual
Bypass
Bypass
Input
Main
Input
Q1
A
Output
Manual
Bypass
Bypass
Input
Main
Input
Q4
29
9 – Start-Up, Shutdown and Bypass
(continued)
1
2
9-8 Start-Up Procedure (Parallel UPS)
Connect the parallel configuration cable
•
A
to the DB9 parallel
configuration port
B
of each UPS system.
Note: Before starting up
the Parallel UPS system, ensure that the “Parallel ID” is different
for each UPS and parallel group is set. (See
Section 10-5-5
for
more details.
If the UPS systems have external battery cabinets connected,
•
switch on the external battery cabinet circuit breaker switch
A
of each battery pack. On the SU20KX or SU40KX, turn ON the
battery breaker on the back of the UPS.
9-8 Start-Up Procedure (Parallel UPS)
(continued)
Switch on the bypass input circuit breaker switch
•
Q2
of each
UPS system. After a brief initialization process, the LCD screen
will show “ON AUTO BYPASS” and the “BYPASS” LED will
illuminate.
Switch on the main input circuit breaker switch
•
Q1
of each UPS
system.
Press the ON button
•
A
of one of the UPS systems for 3 seconds
(until you hear a beep), then release the button. The inverter will
activate and synchronize with the bypass source. Press the ON
button for the other UPS system for 3 seconds (until you hear a
beep), then release the button. When the inverter of each UPS
system is operating normally, they will automatically switch from
auto bypass (reserve) mode to online (normal) mode at the same
time. The “BYPASS” LED will darken and the “NORMAL” LED
will illuminate.
Check the output voltage of each UPS system. The phase deviation
•
between each UPS system should be less than 5V. If the phase
deviation is within the acceptable range, switch on the output
circuit breaker switch
Q4
of each UPS system. Note: For more
information on checking the output voltage of each UPS system,
see
Section 10-4
.
3
4
5
6
