1
5
9
3
7
11
2
6
10
4
8
12
13
14
1
2
3
5
4
A
Output
Manual
Bypass
Bypass
Input
Main
Input
Q2
Q4
Output
Output
Manual
Bypass
Manual
Bypass
Bypass
Input
Bypass
Input
Main
Input
Main
Input
Q3
Q1
A
32
9 – Start-Up, Shutdown and Bypass
(continued)
9-11 Switching from Manual Bypass to Normal Mode (Parallel UPS)
If the UPS systems have external battery cabinets connected,
•
switch off the external battery cabinet circuit breaker switch
A
of each battery pack. On the SU20KX or SU40KX, turn OFF the
battery breaker on the back of the UPS.
Switch on the bypass input circuit breaker switch
•
Q2
and the
output circuit breaker switch
Q4
of each UPS system.
Confirm that both UPS systems are shut down, then switch off
•
the manual bypass input circuit breaker switch
Q3
of each UPS
system. The LCD screen will read “ON AUTO BYPASS”.
Switch on the main input circuit breaker switch
•
Q1
of each UPS
system.
Press the ON button
•
A
of the first UPS systems for 3 seconds
(until you hear a beep), then release the button. Press the ON
button for the second 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 switch to online (normal)
mode at the same time.
1
2
3
4
5
