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Ndrive HL User’s Manual
Troubleshooting
www.aerotech.com 6-1
CHAPTER 6:
TROUBLESHOOTING
6.1. Problems, Causes, and Solutions
This section covers symptoms, probable causes, and solutions related to Ndrive HL
operation. Table 6-1 lists the most common symptoms of irregular operation and the
possible causes and solutions for these faults. More information can be found in the
Nview HMI help.
Before performing the tests described in Table 6-1, be
aware of
lethal voltages
inside the controller and at the
input and output power connections. A qualified service
technician or electrician should perform these tests.
Table 6-1.
Amplifier Faults, Causes, and Solutions
Symptom
Possible Cause and Solution
Motor spins uncontrollably.
Encoder (sine and cosine) signals are improperly
connected. See Section 2.5. for motor phasing
information.
Brushless motor will not
spin.
Motor phases A, B, and C connected incorrectly relative to
Hall A, Hall B, and Hall C inputs. See Section 2.5. for
motor phasing information.
Amplifier faults (“ENABLE”
LED de-energizes) when
the motor decelerates.
Bus over voltage detected (Ndrive HL). This condition
indicates an excessive regeneration condition.
Amplifier Faults ("ENABLE"
LED de-energizes).
1. RMS current exceeded - run at a lower current.
2. Over temperature condition - Turn off and let amplifier
cool down. Provide better ventilation.
3. Defective on board power supply - Return for repair.
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