Troubleshooting
DynaDrive 1525-BRS - User Guide Page 17
5. Troubleshooting
5.1 Diagnostic LEDs
There are four diagnostic LEDs:
1) RUN GREEN
2) BUS OVER VOLTAGE
3) RMS/ OVER TEMP
4) SURGE/ GROUND FAULT
5.1.1 Green LED
RUN GREEN - Indicates the amplifier is working properly. When the green LED goes OFF and
there is no red LEDs ON, the following may have occurred:
1. Loss of power to the amplifier.
2. Bus Voltage less than 60 VDC.
3. Amplifier has been inhibited by J1, Pin 8.
5.1.2 Red LEDs:
Note: When a red LED is ON, the amplifier has been inhibited and remains inhibited until reset.
To reset, toggle J1 pin 8 momentarily to Common.
5.1.2.1 BUS OVER VOLTAGE
Indicates that the bus voltage has exceeded 205 VDC. This condition may be caused by rapid
deceleration or back driving of the motor. A shunt regulator is required to dissipate the motor
energy. If a shunt regulator is present in the system check its fuses.
5.1.2.2 RMS/OVER TEMP
• Excess RMS - The amplifier delivered current beyond its continuous capability. This
condition can exist if a machine is asked to perform a task greater than its design
capabilities. This would include a motor that is mechanically stalled or binding or a
motor with shorted stator (armature) wires.
• Over temperature
- The heat sink has exceeded 80 °C. An over temperature condition
may exist for the following reasons:
1. Insufficient airflow across the heat sink.
2. Ambient cabinet temperature too high.
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