General; Conventions Used In This Manual; Basic Control Usage; Systemvu Control - Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting

CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may cause equipment
damage.
This unit uses a microprocessor- -based electronic control
system. Do not use jumpers or other tools to short out
components or to bypass or otherwise depart from
recommended procedures. Any short- -to- -ground of the
control board or accompanying wiring may destroy the
electronic modules or electrical components.
WARNING
!
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, personal injury, or
loss of life. Refer to the User's Information Manual
provided with this unit for more details.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. What
to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any phone in
your building.
3. IMMEDIATELY call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
4. If you cannot reach your gas supplier, call the fire
department.

GENERAL

This publication contains Start- -Up, Controls, Operation, Service,
and Troubleshooting information for the 48/50LC rooftop units
equipped with the factory- -installed optional SystemVut controls
(version 2.X or higher) and use Puronr (R- -410A) refrigerant. The
specific base unit installation instructions, service manual and/or
wiring label diagram may also be required in conjunction with this
book as a guide to a specific unit on the roof. All units in Table 1
are Staged Air Volume (SAVt) units that allow for stand- -alone or
network operation.
Table 1 – Rooftop Units
MODEL SIZE
04
05
06
07
08
09
48/50LC
12
14
17
20
24
26

Conventions Used in This Manual

The following conventions for discussing configuration points for
the local display (SystemVu controller or Navigatort accessory)
will be used in this manual.
Menu paths will be written with the main menu name first, then
any menus or sub menus, each separated by an arrow symbol ()
and will also be shown in bold and italics. As an example, the
General sub menu which is located in the Setting main menu under
Unit Configuration menu would be written as SETTINGS
UNIT CONFIGURATIONSGENERAL.
This path name will show the user how to navigate through the
local display to reach the desired menu. The user scrolls through
the Menus using the up and down keys. The arrow symbol in the
path name represents pressing ENTER to move into the next level
of the menu structure.
Point names are referenced in in parentheses and bold and italics as
would be shown on the local display.
CCN point names are also referenced for users configuring the
unit with CCN software instead of the local display. See
Appendix A at the end of this manual.
SystemVu Control (factory- -installed option)
The SystemVu control is a comprehensive unit-management
system. The control system is easy to access, configure, diagnose
and troubleshoot.
The SystemVu control system is fully communicating and
cable-ready for connection to the Carrier Comfort Network
(CCN), Carrier i- -Vu
management
communications for remote monitoring via the Internet. Multiple
units can be linked together (and to other Direct Digital Control
(DDC) equipped units) using a 3-wire communication bus.
The SystemVu control system is easy to access through the use of a
integrated display module. A computer is not required for start-up.
Access to control menus is simplified by the ability to quickly
select from 7 main menu items. An expanded readout provides
detailed explanations of control information. Only six buttons are
required to maneuver through the entire controls menu. The
display readout is designed to be visible even in bright sunlight.
NOMINAL TONS
3
4
5

SystemVu Interface

6
This integrated device is the keypad interface used to access the
7.5
control information, read sensor values, and test the unit. The
8.5
interface is located in the main control box and is standard on all
10
units. The interface is a 6- -key, 4x30 character, LCD (liquid- -crystal
12.5
display) display module. The interface also contains Status LEDs.
15
(See Fig. 1.) The interface is easy to operate using 6 buttons and
17.5
the main menu structures shown in Fig. 2.
20
Through the SystemVu interface, the user can access all of the
23
inputs and outputs to check on their values and status, configure
operating parameters, and evaluate the current decision status for
operating modes. The control also includes an alarm history which
can be accessed from the display. The user can access a built- -in test
routine that can be used at start- -up commissioning and
troubleshooting.
*
3

BASIC CONTROL USAGE


, and Third Party BACnet* building
systems. The control
System u
RUN
ALERT
FAULT
TEST TEST BACK
Fig. 1 - - SystemVu Interface
BACnet is a registered trademark of ASHRAE (American Society of
Heating, Refrigerating and Air ---Conditioning Engineers).

provides high-speed
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