User Instructions UM582127000
Spec. No. 582127000 (Model 721NPBB) Issue AC, January 2, 2013
Chapter 3. Maintenance Page 21
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CHANGING THE ACU+ LVD CONTROL LEVEL FOR A CONTACTOR
The ACU+ Controller has two available LVD control levels (LVD1 and LVD2). The level
used to control a contactor is determined by which connector on the LVD circuit card its
control leads are plugged into. To change the LVD control level for a contactor, simply
switch which LVD connector it is plugged into (if an open connector is available) on the
LVD circuit card. Refer to Figure 4-14 and Figure 4-15 for connector location and
function.
Note: DO NOT change a Low Voltage Load Disconnect contactor to LVD Control Level
2 (LVD2) if the system is furnished with a Low Voltage Battery Disconnect
contactor.
ADDING A SUPPLEMENTAL BAY IN THE FIELD
Refer to the Power System Installation Instructions (IM582127000) for procedures
detailing mounting and wiring of the supplemental bay.
Supplied with the supplemental bay is a USB drive which contains a “SettingParam.run”
file. Download this file into the ACU+ Controller to program the ACU+ Controller for use
with the newly installed supplemental bay. Refer to the ACU+ Instructions
(UM1M820BNA) for a download procedure. There are also labels located near the
SM-DU and SM-DU+ in the supplemental bay that detail the ACU+ settings for this bay.
Once the ACU+ has been programmed for the newly installed supplemental bay, refer to
the ACU+ Instructions (UM1M820BNA) and save a copy of the “SettingParam.run” file.