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™
-48V DC Power System
User Instructions, UM582127000 (Issue AD, January 20, 2014)
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
25and
Figure 26
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 or UM1M820DNA400) 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
or UM1M820DNA400) and save a copy of the "SettingParam.run"
file.
Troubleshooting and Repair
Contact Information
Support contact information is provided on the inside of the back
cover of this document.
Controller, Rectifiers, and Converters
For troubleshooting and repair instructions on these units, refer to
the following documents.
•
ACU+ Controller Instructions (UM1M820BNA or
UM1M820DNA400)
•
Rectifier Instructions (UM1R483500E or UM1R482000E3)
•
Converter Instructions (UM1C400483500E or
UM1C48241500)
ACU+ Controller Configuration
If any ACU+ Controller configuration settings were changed, refer
to the ACU+ Instructions (UM1M820BNA or UM1M820DNA400)
Spec. No: 582127000
Model No: 721
NPBB
and save a copy of the configuration file. This file can be used to
restore the ACU+ Controller settings, if required, at a later date.
•
Note that provided on a USB drive furnished with the
system is an ACU+ configuration drawing (C-drawing)
and the ACU+ configuration files loaded into the ACU+ as
shipped.
System Troubleshooting Information
Figure
This system is designed for ease in troubleshooting and repair. The
various indicators as described in "Local Controls and Indicators"
on page 2 and in the Controller and Rectifier Instructions are
designed to isolate failure to a specific element. Once the faulty
element has been identified, refer to "Replacement Information"
on page 20 and "Replacement Procedures" on page 20.
Troubleshooting Alarm Conditions on the ACU+ Controller
The ACU+ Controller displays alarm conditions as listed in the
Available Alarms section of the ACU+ Instructions (UM1M820BNA
or UM1M820DNA400). Programmable external alarm relays are
also available. Refer to the System Installation Instructions
(IM582127000) and the configuration drawing (C-drawing)
supplied with your power system documentation for your alarm
relay configurations.
Active Alarm
The ACU+'s
User to view alarm details. Refer to the ACU+ Instructions
(UM1M820BNA or UM1M820DNA400) to access these menus.
Checking the ACU+ Current Limit Point after Adding or
Removing a Rectifier Module or Converter Module
If a rectifier module or converter module is added to the power
system, the system current limit point will automatically increase
by the percentage each existing rectifier or converter was set to
provide prior to the addition.
If a rectifier module or converter module is removed from the
system (and the Rect Comm Fail or Conv Comm Fail alarm is reset),
the current limit point will remain unchanged unless the capacity
of the remaining rectifiers or converters is not sufficient to
maintain the present current limit point. If that happens, the
current limit point will automatically increase to the maximum
(121% of the remaining rectifiers or converters).
It is recommended that the current limit point be checked
whenever a rectifier module or converter module is added to or
removed from the power system.
When setting total rectifier or total converter current limit, the set
point to each unit is the total set point divided by the number of
units. For example, if the system contains five rectifiers and the
current limit is set to 150 amps then each rectifier has a current
limit set point of 30 amps. If one or more rectifiers or converters
[18]
Alarm History
and
submenus allow the
Code: UM582127000
Issue AD, January 20, 2014
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