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
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:
*Y means that this program can be set in this mode
09
10
11
12
13
14
15
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Reserved for future use
Reserved for future use
01
02
03
04
05
06
07
08
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Output voltage
Output frequency
Voltage range for bypass
Frequency range for bypass
ECO mode enable/disable
Voltage range for ECO mode
ECO mode frequency range setting
Bypass mode setting
Battery backup time setting
Reserved
Reserved
Hot standby function enable/disable
Battery voltage adjustment
Charger voltage adjustment
Output voltage adjustment
Code
Description
Bypass
Y
AC
ECO CVCF Battery Battery
test
Abbreviation
Display content
Meaning
ADD
ON
OFF
FBD
OPN
RES
PAR
Add
On
Off
Not allowed
Allow
Reserved
Parallel
Note: All parameter settings will be saved only when UPS shuts down normally with internal or external battery connection. (Normal
UPS shutdown means turning off input breaker in bypass/no output mode).
Parameter 3: Output voltage
You may choose the following output voltage in parameter 3:
For 100/110/115/120/127VAC models, you may choose the following output
voltage:
208: The output voltage is 208VAC
220: The output voltage is 220VAC
230: The output voltage is 230VAC
240: The output voltage is 240VAC
100: The output voltage is 100VAC
110: The output voltage is 110VAC
115: The output voltage is 115VAC
120: The output voltage is 120VAC
127: The output voltage is 127VAC
Interface
Setting
Parameter 2: Output frequency
To set the output frequency, choose any of the following three options in
parameter 2:
50.0Hz: The output frequency is set to 50.0Hz.
60.0Hz: The output frequency is set to 60.0Hz.
ATO: When selected, the output frequency will be set according to the latest
normal utility frequency. If it ranges from 46Hz to 54Hz, the output frequency
will be 50.0Hz.
If it ranges from 56Hz to 64Hz, the output frequency will be set at 60.0Hz.
ATO is the default setting.
Parameter 3: Frequency mode
Enables you to set the output frequency in either CVCF mode or no CVCF
mode. You may choose any of the following two options in parameter 3:
CF: Sets the UPS in the CVCF mode. If selected, the output frequency will be
fixed at 50Hz or 60Hz according to the setting in parameter 2. The input
frequency could range from 46Hz to 64Hz.
NCF: Sets the UPS to normal mode (not CVCF mode).
If selected, the output frequency will synchronize with the input frequency
within 46~54 Hz at 50Hz or within 56~64 Hz at 60Hz according to the setting
defined in parameter 2.
If 50Hz is selected in parameter 2, the UPS will transfer to battery mode
provided the input frequency does not fall within 46~54Hz range. If 60Hz is
selected in parameter 2, the UPS will transfer to battery mode provided the
input frequency does not fall within the 56~64Hz range.
*If ATO is selected in Parameter 2, Parameter 3 will show the current
frequency
Interface
Setting
02: Output frequency settings
01: Output voltage settings
60 Hz, CVCF mode
50 Hz, Normal mode
ATO
Note: If the UPS is set to CVCF mode, the bypass function will be disabled automatically.
But when a single UPS without parallel function is powered on with utility power and before the UPS finishes the startup, there will
be a few seconds of voltage pulse (same as the input voltage) on the bypass output.
If you need to remove the pulse on this mode to better protect your load, you could contact the dealer for help.
This situation will not happen in UPS units working on parallel mode.
Parameter 1
Parameter 2
Parameter 3
Parameter 1: it is used for the different configuration options. There are 15
programs to set up. Refer to the table below.
Parameter 2 and parameter 3: they represent the setting options or values of
each program.
