48
APPENDIX —
VFD Operation with Remote Keypad
All 48LC size 04--06 units are equipped with a VFD
(Variable Frequency Drive) to automatically adjust the
indoor fan motor speed in sequence with the unit’s
ventilation, cooling and heating operation. The VFD keypad
is included as standard on electro mechanical and RTU Open
models. See Fig. 74 for location of the VFD and the VFD
keypad in these units.
NOTE: ComfortLink models do not include the VFD
keypad as VFD control operation is accessed through the
ComfortLink controls.
The VFD keypad is shown in Fig. 73. The function of SOFT
KEYS 1 and 2 change depending on what is displayed on
the screen. The function of SOFT KEY 1 matches the word
in the lower left--hand box on the display screen. The
function of SOFT KEY 2 matches the word in the lower
right--hand box on the display screen. If the box is empty,
then the SOFT KEY does not have a function on that
specific screen. The UP and DOWN keys are used to
navigate through the menus. The OFF key is used to turn off
the VFD. The AUTO key is used to change control of the
drive to automatic control. The HAND key is used to change
control of the drive to local (hand held) control. The HELP
button is used to access the help screens.
For the VFD to operate on the units covered by this
document, the drive must be set in AUTO mode. The word
“AUTO” will appear in the upper left hand corner of the
VFD display. Press the AUTO button to set the drive in
AUTO mode.
C08675
Fig. 73 -- VFD Keypad
Use the RJ--45 (CAT5) cable (bundled with the Control
Harness -- see Fig. 74) to provide easier access for using the
VFD Remote Keypad. The cable’s length is long enough to
route it through to the unit’s control box, if desired.
To Connect the VFD Keypad using the RJ--45 Cable —
1. Remove the Keypad from the front of the VFD.
2. Remove the RJ--45 adapter from the back of the Re-
mote Keypad and insert the adapter into the RJ--45
port on the front of the VFD.
3. Separate the RJ--45 (CAT5) cable from the Control
Harness.
4. Use the CAT5 cable to connect the Remote Keypad to
the VFD.
RJ-45 (CAT5) Cable
(Bundled with Control Harness)
ABB VFD
w/ Remote Keypad
C13394
Fig. 74 -- Location of VFD in 48LC 04--06 Units
48LC
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