Note:
0 = no jumper; 1 = connect with jumper
13. Changing charging current
1) This operation should only be performed by trained and qualified technicians.
2) Turn off the UPS. If the load couldn’t be cut off, you should remove the cover of maintenance bypass switch on the rear
panel and turn the maintenance switch to the BPS position first.
3) Switch off the input breaker.
4) Remove the cabinet cover, and disconnect battery wire. Then modify the jumpers on the charger board to set the charging
current (refer to table below). Be careful that the maximum setting should not exceed the charging current acceptable for the
battery.
3.5 Parallel operation
UPS installation for parallel systems
If the UPS is only available for single operation, you may skip this section to the next.
1. Please follow the instructions to make sure the UPS systems are correctly wired for parallel operation. Refer to the
illustration below:
Charge current (A)
1A
2A
3A
4A
JP06
JP07
JP08
0
0
1
0
1
0
1
0
0
0
0
0
1. Failure to connect the Non-isolated neutral between each UPS may permanently damage the units.
2. Connect the output of each UPS to an output breaker.
3. Connect all output breakers to a main breaker. The latter is the one that will be connected to the loads.
4. If using external power banks, each UPS must be connected to its own power bank. In the event a single power bank is used
for all the UPS units, it will cause permanent damage to the equipment.
5. Connect both parallel cables between each UPS, the communications cable (DB-25) and the load balancing cable, as
illustrated below:
Once the above connections are completed, verfify that the following conditions are met:
1. Verify that the input voltage is the same for all UPS units (208, 220, 230 o 240V)
2. Turn on the UPS and the battery breaker located on the back panel of the UPS.
3. If the configuration is successful, the following screen will be displayed in all UPS units.
4. Verify the output voltage in Bypass mode using one enabled output breaker.
5. Next, turn the other output breaker on making sure that output is the same ouput in every UPS. The output difference among
all UPS units must not exceed 1V.
6. Once you have checked all the above, turn OFF all the UPS units and output breakers in order for this configuration to take
effect.
7. Finally, power on the UPS units to begin operation in Parallel mode.
3-6. Abbreviations on the LCD display
***Important*** Connect the Non-isolated neutral between each UPS. (This is the electric reference point for the transformer)
Non-isolated Neutral
Output
Line 1
Output
Neutral 1
Output
Neutral 2
Input
Neutral
Output
Line 2
Input
Line
L1 N1 L2 N2 L1 L2
L1 N1 L2 N2 L1 L2
3-7. UPS parameter settings
Three parameters need to be configured in order to set up the UPS. Refer to the following diagram.
List of the 15 programs for parameter 1:
ENA
DIS
ATO
BAT
Enable
Disable
Auto
Battery
Abbreviation
Display content
Meaning
NCF
CF
SUB
Normal mode (not CVCF mode)
CVCF mode
Subtract
Communication port connection
Parallel cable connections
