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rH
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Braking Resistor Overheat
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The deceleration time is too short and excessive regenerative energy is flowing back into the drive.
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Check the load level, deceleration time, and speed.
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Decrease the load.
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Increase the values set in C1-02, C1-04, C1-06, or C1-08 [Deceleration Times].
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Use a dynamic braking option that lets you use more power.
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The duty cycle is too high.
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Examine the duty cycle.
Note:
When L8-01 = 1 [3% ERF DB Resistor Protection = Enabled], the maximum braking duty cycle is 3%.
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The braking load is too heavy.
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Calculate the braking load and braking power again, and decrease the braking load.
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Use a braking resistor that improves braking power.
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The braking resistor is not sufficient.
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Use the braking resistor specifications to select a sufficient braking resistor.
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Note:
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The drive detects this error if the braking resistor overheat protective function is active.
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The magnitude of the braking load causes the braking resistor overheat alarm, NOT the surface temperature. If the duty cycle is higher than the braking resistor rating, the drive will show the alarm.
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Do a Fault Reset to clear the fault.
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Parameter L8-01 enables and disables rH detection.
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