15
MicroStar B
Service manual
MicroStar B
rev06
09
09
09
09
09
Leds
Indicator Leds and Protections
1.11
Five LEDs are located just in front of the potentiometers and show the current state of
the drive.
FUNCTION
OK
GREEN
Normally ON. This indicator shows that the drive is operating correctly. If
this LED is Off, it is indicating at least one fault has been activated. The
faults that affect this LED are:
--Over/Under input voltage.--Over temperature.
--Short Circuit, Outputs shorted to each other or to ground.--Missing Hall.
IN
RED
Normally OFF.
This indicator is lit if the drive is in over nominal current
mode.
ST
RED
Normally OFF.
This indicator is lit when the drives internal temperature
reaches 70°C . Remove power and wait for the drive t o cool before re-
applying power. If operating temperatures are close to the Max operating
temperature of the drive, a fan, heat sink or air conditioner may be needed
to remedy the problem.
OC
RED
Normally OFF.
This indicator is lit if there is a short circuit between the
motor leads and/or ground. Remove power and examine the motor
connecting leads for shorts before re-powering the drive.
AH
RED
Normally OFF.
If lit it represents either missing Hall. Have a qualified
technician check the Hall Effect signals with a voltmeter or an oscilloscope.
This fault is a latching fault.
This DRIVE is equipped with protection circuits to safeguard both the motor and the
drive, in case of faults malfunctions. All faults are indicated by LEDs on the front.
The two types of interventions are Reversible and Irreversible
Reversible: The drive is automatically reset/restarted when the cause of intervention
has been corrected. - Nominal Current IxT limitation - Over/under voltage input
Irreversible: The drive is not reset/restarted. The power supply must be removed and
the cause of intervention eliminated, then the power supply can be replaced.
*Note: A mininum amount of time must pass in order to ensure that the drive is completely
off prior to replacing the power supply. - Short circuit motor - Over temperature drive -
Missing Hall Signals - Improper Hall Commutation
Protections