VFD68 Variable Frequency Drives (230 or 460 VAC)
25
Setup and Adjustment
Correspondences Between Digital and Actual Characters
The actual alphanumeric characters correspond to the following digital characters displayed on the
operation panel:
Operation Modes
The VFD68 drive’s mode of operation is indicated by the mode of operation LEDs (labeled PU, EXT, and NET)
on the drive’s operation panel (Figure 17).
PU Mode:
The Parameter Units (PU) mode is manual control mode. In PU mode, the drive and motor are
completely controlled using the buttons and the setting dial on the drive’s user interface. No external analog
signals or network signals control the drive operation. The PU mode is typically used to set up, test, and
troubleshoot the drive and motor operation using controlled input signal values.
EXT Mode:
In the External (EXT) mode, the drive and motor respond to a signal or signals from one or two
(external) analog input signal devices such as pressure transducers or analog controllers. This is the typical
mode of operation for the drive when it controls a condenser fan or other three-phase HVACR motor
application.
PU/EXT Mode:
In PU/EXT mode, the drive responds to the connected external signal devices and the drive
setup values can be edited. The PU/EXT mode is typically used to set up your drive for initial operation, or to
adjust setup parameters on an operating application.
NET Mode:
In Network (NET) mode, the drive connects to and communicates over a network bus with other
network devices and receives operating
(Read/Write) commands from a master device on the network. The Network mode is not currently supported
on VFD68 drives.
IMPORTANT:
If the LED display shows an error code, press
and see
35 for a list of fault or alarm indications, probable causes, and corrective actions.
STOP
RESET
STOP
RESET
Actual
Digital
0
1
2
3
4
5
6
7
8
9
Actual
Digital
A
B
C
E
F
G
H
I
J
L
D
Actual
Digital
M
N
O
o
P
T
U
V
r
-
S
