Notes Concerning Starting Up The Parallel System - GE Digital Energy LP 11U Installation & User Manual

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5. The right option slot (14) at the rear of the unit contains the the RPA-card. Before the parallel system can
be put into operation a unique number has to be appointed to each UPS in the system. This can be 0, 1,
2 or 3. Start with 0 for the first unit, 1 for the second, 2 for the third and 3 for the last unit:
- loosen the screws, remove the RPA-card
- set the dipswitch to the appointed number (fig. 18)
- re-install the RPA-card, fasten the screws.
Do NOT install the network cables between the RPA-cards of the units yet!
6. In the UPS many parameters can be set. It is advised to keep the same setting for each parameter in
each UPS in the parallel system. In any case the following parameters are critical and should have equal
settings:
- autorestart (on/off, see 5.3.3)
- output voltage (120/208/220/230/240 Vac, see 5.3.4)
- output frequency (50/60 Hz, see 5.3.4)
It is absolutely required that these parameters are set to the same value. Off factory this is the case. If
you're not sure that the units have equal settings:
- be sure that the RPA-cards of the units have not been interconnected yet
- be sure that utility power is connected to the UPS
- start each unit individually (see 5.2), check / change the parameters, and switch the unit off again.
7. Interconnect the RPA-cards of the units, using the network cable that came with the UPS. See figure 17
(dotted line). Only install the cables that were delivered with the UPSs! Of the first and the last UPS in
the system only one RPA-socket is used to interconnect the UPSs. A bus terminator must be placed in
the other (free) RPA-socket. The required bus terminators have been delivered with the unit.

4.5.6.2 Notes concerning starting up the parallel system

For starting up the system please refer to section 5.2.
After switching on all units the LP UPSs will show the following display:
After pressing the 'Enter/Reset' button on one of the units the system will start up. All units will display the
standard screen. The number in the lower right corner indicates the number of the UPS in the system.
If the parameters mentioned in 4.5.6.1 step 6 are not set to the same value the UPS will display the following
screen after start-up:
In this case check and correct the setting of the parameters as mentioned in 4.5.6.1, step 6.
LX: OPM_LPU_11U_5K0_10K_1US_V030
AUTORESTART OFF
PRESS ENTER
LP 5-11U
LOAD 40% 2
AUTORESTART OFF
SETTING MISMATCH
20
Digital Energy
Figure 18. Appointing a unique
number to each UPS in the system
GE DE LP 11U UPS: Installation / User Manual 3.0 (US)
™
LP Series