11.3 Restarting the Drive After an I2t Fault Has Cleared –
The drive can be restarted after an
I
2
t Fault has cleared by any of the following methods.
Note:
If an I
2
t Fault occurs, the motor may be overloaded. Check the motor current with an
AC RMS responding ammeter. Also, the CL setting may be set too low. See Section 13.7, on
pages 42 and 43.
1
Disconnect and reconnect the AC power (approximately 15 seconds). The “ST” LED must
change from quick flashing red to flashing red/yellow.
2
Set the Main Speed Potentiometer to zero (fully counterclockwise).
Note:
In order to be able to reset the drive by setting the Main Speed Potentiometer to zero,
it is necessary to have the MIN Trimpot set to zero (fully counterclockwise).
3
Open and close the Enable switch or contact. See Section 9.8, on pages 34 and 35.
12 DIAGNOSTIC LEDS
The drive contains two diagnostic LEDs to display the drive’s operational status. See Figure 4, on
page 20, for the location of the “PWR” and “ST” LEDs.
12.1 Power On (PWR) –
The “PWR” LED will illuminate green when the AC line is applied to the
drive.
12.2 Status LED (ST) –
The “ST” LED is a tricolor LED which provides indication of a fault or
abnormal condition. The information provided can be used to diagnose an installation problem
such as incorrect input voltage, overload condition, and drive output miswiring. It also pro-
vides a signal which informs the user that all drive and microcontroller operating parameters
are normal. Table 4, on page 38, summarizes the “ST” LED functions.
37
