Parallel Setting - LEGRAND Daker DK 4.5-6 kVA Parallel Installation Quick Start

• Set the Parallel function to "Enable" (P 02)
UPS#
ID NUMBER
PARALLEL
FUNCTION
Table 3
Turn off the inverter and then the AC input (Turn off CBi and CB1 of the UPS) and restart the process
for the next unit.
Er21 Check (Communication Failure or Can not find ID1 unit)
• Ensure that the AC input and the inverter is off for all the UPS connected.
• Turn on the AC input only for UPS#2, UPS#3, UPS#4
The UPS#2, UPS#3, UPS#4 LCD will show "Er21".
• Turn on UPS#1 AC input.
The UPS#2, UPS#3, UPS#4 stop showing "Er21"
UPS#
TEST
TEST OK
Table 4
If the error Er21 still appear on the display of one UPS please verify and eventually repeat the
setting and wiring process described above to solve eventual communication problem.
CAUTION
do not start the UPSs inverters before the Er21 test is passed to avoid unpredictable failures
or damages.
12
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UPS#1
UPS#1
AC OFF
UPS#2
4 Parallel Mode Start up
UPS#2

4 Parallel Setting

UPS#3
UPS#3
UPS#4
UPS#4