27
GLENTEK Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
SMA7215 MANUAL
7.2.2 Under Voltage Fault:
When the +15VDC power supply is below +12VDC, a level that would cause unreliable
operation, the Run LED will turn off, a Fault Output is generated, and the amplifier is inhibited.
This is not a latched condition: that is, if the problem is resolved the amplifier will resume
operation.
The following is a list of possible causes:
•
Main buss line voltage is too low.
•
Bad power supply.
7.2.3 High Speed Electronic Circuit Breaker (HS/ECB) Fault:
When the peak output of the amplifier exceeds 80A for 10 microseconds, the Run LED
will turn off, the HS/ECB LED will turn on and a Fault Output is generated, and the amplifier is
inhibited. NOTE: This is a latched condition.
The following is a list of possible causes:
•
Shorted motor leads.
•
Motor inductance too low.
•
Short from a motor lead to ground.
7.2.4 Low Speed Electronic Circuit Breaker (LS/ECB) Fault:
When the RMS output of the amplifier exceeds 13A for standard or 18A for high power
for 5 seconds, the Run LED will turn off, the LS/ECB LED will turn on and a Fault Output is
generated, and the amplifier is inhibited. NOTE: This is a latched condition.
The following is a list of possible causes:
•
Binding or stalling of motor shaft due to excessive mechanical overload.
•
Overload of amplifier output to motor.
•
Large reflected load inertia.
7.2.5 Over Temp Fault:
When the amplifier heatsink temperature has reached a level that, if exceeded, would
damage the output transistors, the Run LED will turn off, the OVER TEMP LED is latched on,
a Fault Output is generated, and the amplifier is inhibited. NOTE: This is a latched condition.
The following is a list of possible causes:
•
Loss of cooling or fans are defective or airflow is blocked.
•
Excessive rise in cooling air temperature due to cabinet ports being blocked or excessive
hot air being ingested.
•
Extended operational duty cycle due to mechanical overload of motor or defective motor.
