GLENTEK Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
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GA45-71PR2/76PR2/81PR2/82PR2 MANUAL
THE OVERTEMP CONDITION CAN ONLY BE CAUSED BY ABNORMAL CONDITIONS. THE CAUSE SHOULD
BE INVESTIGATED BEFORE REPEATED RECYCLING OF THE MOTOR DRIVE TO PREVENT POSSIBLE
DAMAGE TO THE AMPLIFIER
The following is a list of possible causes:
1. Loss of cooling air - Fans are defective or airflow is blocked.
2. Excessive rise in cooling air temperature due to cabinet ports being blocked or excessive hot air being in
gested.
3. Extended operational duty cycle due to mechanical overload of motor or defective motor.
4. Defective power output section due to component failure (Return to Glentek for repair).
5. Noisy Tachometer Signal - A noisy tachometer causes a considerable amount of random switching of the
power output transistors, thus increasing the amount of heat developed in the output section. The higher
the bandwidth, the more the heating due to a noisy tachometer. A noisy tachometer can be identified by a
large amount of rumbling and twitching of the motor at low or zero shaft speeds.
See section 2.3.1 on resetting the fault latch. Note: The fault latch will not reset unless the fault has been
removed.
7.2.5 LOW-SPEED ELECTRONIC CIRCUIT BREAKER (LS/ECB) SHUTDOWN:
The LS/ECB is tripped when a preset current threshold is exceeded for a preset length of time.
See Typical Settings, section 2.4.7.
List of possible causes:
1. Binding or stalling of motor shaft.
2. Overload of amplifier output to motor.
3. Large reflected load inertia.
See section 2.3.1 on resetting the fault latch. Note: The fault latch will not reset unless the fault has been
removed.
7.2.6 HIGH-SPEED ELECTRONIC CIRCUIT BREAKER (HS/ECB) SHUTDOWN:
The
HS/ECB is tripped when a preset current threshold is exceeded for a preset length of time.
See Typical Settings, section 2.4.7.
List of possible causes:
1. Shorted motor leads.
2. Intermittent motor short.
3. Motor inductance too low.
4. Motor commutator flash over.
See section 2.3.1 on resetting the fault latch.
Note: The fault latch will not reset unless the fault has been removed.
7.3 FACTORY REPAIR:
Should it become necessary to return a GA45xxPR2 to Glentek for repair, please follow the procedure de
scribed below:
1. Reassemble the unit, if necessary, making certain that all the hardware is in place.
2. Tag the unit with the following information:
A. Serial number and assembly unit.
B. Company name and representative returning the unit.
C. A brief notation explaining the malfunction.
D. Date the unit is being returned.
