Vfd Modes; Standard Display Mode; Parameters Mode; Changed Parameters Mode - Carrier 39LA-25 Installation, Start-Up And Service Instructions Manual

5. Use the UP or DOWN keys to change the value of the
parameter.
6. Press SAVE (SOFT KEY 2) to store the modified value.
Press CANCEL (SOFT KEY 1) to keep the previous value.
Any modifications that are not saved will not be changed.
7. Choose another parameter or press EXIT (SOFT KEY 1) to
return to the listing
Continue until all the parameters have been configured and
then press EXIT (SOFT KEY 1) to return to the main menu.
NOTE: The current parameter value appears above the highlight-
ed parameter. To view the default parameter value, press the UP
and DOWN keys simultaneously. To restore the default factory
settings, select the application macro "HVAC Default."

VFD Modes

The VFD has several different modes for configuring, operating,
and diagnosing the VFD. The modes are:
• Standard Display mode — shows drive status information
and operates the drive
• Parameters mode — edits parameter values individually
• Start-Up Assistant mode — guides the start up and config-
uration
• Changed Parameters mode — shows all changed parame-
ters
• Drive Parameter Backup mode — stores or uploads the pa-
rameters
• Clock Set mode — sets the time and date for the drive
• I/O Settings mode — checks and edits the I/O settings

STANDARD DISPLAY MODE

Use the Standard Display mode to read information on the drive
status and operate the drive. To reach the standard display mode,
press EXIT until the LCD display shows status information as de-
scribed below. See Fig. 27.
MODE
Fig. 27 — Standard Display Example
The top line of the LCD display shows the basic status informa-
tion of the drive. The HAND icon indicates that the drive control
is local from the control panel. The AUTO icon indicates that the
drive control is in remote control mode through the I/O.
The arrow icon indicates the drive and motor rotation status. A ro-
tating arrow (clockwise or counterclockwise) indicates that the
drive is running. A rotating blinking arrow indicates that the drive
is running but not at set point. A stationary arrow indicates that the
drive is stopped. For Carrier air handler units, the rotation is al-
ways forward.
Using parameter group 34, the middle of the LCD display can be
configured to display 3 parameter values. The default display
shows parameters 0103 (OUTPUT FREQ) in Hz, 0104 (CUR-
RENT) in amperes, and AI1 (Analog Input 1) in revolutions per
minute.
The upper right hand corner shows the frequency set point that the
drive will maintain.
The bottom corners of the LCD display show the functions cur-
rently assigned to the two soft keys. The lower middle displays the
current time (if configured to show the time).
of parameter groups.
SET POINT
The first time the drive is powered up, it is in the OFF mode. To
switch to local hand-held control and control the drive using the
control panel, press the HAND or AUTO buttons. Pressing the
HAND button switches the drive to hand control while keeping
the drive running. Pressing the AUTO button switches the drive to
remote input control. The OFF button stops the drive. To return to
auto control, press the AUTO button. To start the drive press the
HAND or AUTO button, to stop the drive press the OFF button.
To adjust the speed set point while in HAND mode, press the UP
or DOWN buttons (the reference changes immediately). The ref-
erence can be modified in the local control (HAND) mode, and
can be parameterized (using Group 11 reference select) to also al-
low modification in the remote control mode.

PARAMETERS MODE

The Parameters mode is used to change the parameters on the
drive. To change parameters, perform the following procedure:
1. Select MENU (SOFT KEY 2). The Main menu will be dis-
played.
2. Use the UP or DOWN keys to highlight PARAMETERS on
the display screen and press ENTER (SOFT KEY 2).
3. Use the UP or DOWN keys to highlight the desired parame-
ter group and press SEL (SOFT KEY 2).
4. Use the UP or DOWN keys to highlight the desired parame-
ters and press EDIT (SOFT KEY 2).
5. Use the UP or DOWN keys to change the value of the
parameters.
6. Press SAVE (SOFT KEY 2) to store the modified value.
Press CANCEL (SOFT KEY 1) to keep the previous value.
Any modifications that are not saved will not be changed.
7. Choose another parameter or press EXIT (SOFT KEY 1) to
return to the listing of parameter groups. Continue until all the
parameters have been configured and then press EXIT
(SOFT KEY 1) to return to the main menu.
NOTE: The current parameter value appears above the high-
lighted parameter. To view the default parameter value, press
the UP and DOWN keys simultaneously. To restore the default
factory settings if a drive fails, download the parameters to the
VFD from the control panel. Parameters can also be changed
individually.

CHANGED PARAMETERS MODE

The Changed Parameters mode is used to view and edit recently
changed parameters on the drive. To view the changed parameters,
perform the following procedure:
1. Select MENU (SOFT KEY 2). The Main menu will be
displayed.
2. Use the UP or DOWN keys to highlight CHANGED PAR
on the display screen and press ENTER (SOFT KEY 2).
A list of the recently changed parameters will be dis-
played.
3. Use the UP or DOWN keys to highlight the desired pa-
rameter group and press EDIT (SOFT KEY 2) to change
the parameters if desired.
4. Press EXIT (SOFT KEY1) to exit the Changed Parame-
ters mode.

DRIVE PARAMETER BACKUP MODE

The Drive Parameter Back-up mode is used to store the drive pa-
rameters. The parameters can be uploaded from a VFD to the re-
movable control panel. If a drive failure occurs, the control panel
can then be transferred to the new drive and the parameters down-
loaded into memory.
Each drive is custom programmed at the factory. The first option
is to download all parameters. This copies both application and
motor parameters to the drive from the control panel. This is
27