User Guide

9 DRIVE OPERATION
9
.1 START-UP PROCEDURE –
A
fter the drive has been properly setup (jumpers and trimpots set to the
d
esired positions) and wiring completed, the start-up procedure can begin. If the AC power has been
p
roperly brought to the drive, the power (PWR) LED will illuminate green. The status (ST) LED will
i
ndicate drive status, as described in Section 11.2, on page 22.
T
o start the drive, momentarily set the Start/Stop Switch to the “START” position. The motor will begin
t
o accelerate to the set speed.
W
ARNING!
U
sing a jumper to eliminate the start/stop function will cause the motor to run at the
M
ain Speed Potentiometer setting when the AC line is applied.
N
ote:
I
f the motor rotates in the incorrect direction, it will be necessary to disconnect the AC line,
reverse any two motor leads, and repeat the start-up procedure.
9.2 FAULT RECOVERY – The drive monitors four faults (Undervoltage, Overvoltage, Short Circuit at the
motor (phase-to-phase), I
2
t).
See Section 9.3, for restarting the drive after an I
2
t fault has cleared. Also see Section 11.2, on
page 22, for the Status (ST) LED indication.
9.3 RESTARTING THE DRIVE AFTER AN I
2
T FAULT – The drive can be restarted after an I
2
t Fault has
cleared by any of the following methods.
Note: Be sure the fault (overload) has been cleared before restarting the drive. Check the motor cur-
rent with an AC RMS responding ammeter. Also, the CL setting may be set too low. See Section
12.7, on page 24.
1. Set the Start/Stop Switch to the “START” position.
2. Disconnect and reconnect the AC power (approximately 15 seconds). The “ST” LED must change
from quick flashing red to flashing red/yellow.
3. Set the Main Speed Potentiometer to zero (fully counterclockwise).
Note: In order to be able to restart the drive by setting the Main Speed Potentiometer to zero, it
is necessary to have the MIN Trimpot set to zero (fully counterclockwise).
Note: If the Forward-Stop-Reverse Switch has been installed, it can be used to restart the drive.
10 AC LINE FUSING
The drive does not contain line fuses. Most electrical codes require that each ungrounded conductor con-
tain circuit protection.
Do not fuse neutral or ground connections. It is recommended to install a fuse
(Littelfuse 326, Buss ABC, or equivalent) or a circuit breaker in series with each ungrounded conductor.
Do
not fuse motor leads
. For the recommended fuse size, see Table 4, on page 10.
Wire the drive in accordance with the National Electrical Code requirements and other local codes that may
apply to the application.
11 DIAGNOSTIC LEDS
The drive contains two diagnostic LEDs mounted on the enclosure cover to display the drive’s
operational status.
11.1 POWER ON LED (PWR) – The “PWR” LED will illuminate green when the AC line is applied
to the drive.
W
ARNING! Do not depend on the PWR LED as a guaranteed power of
f condition.
Be sure the main power switch or circuit breaker is in the “OFF” position before
servicing this drive.
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