Troubleshooting
Ndrive HP 10/20/30 Manual
6-2
www.aerotech.com
Risk of electric shock.
Residual voltages inside the Ndrive HP controller may
exceed 60 Volts after AC power has been disconnected
for 10 seconds.
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
motor decelerates.
Bus over voltage detected (Ndrive HP 10/20). This
condition indicates an excessive regeneration condition.
The Ndrive HP 10/20 requires that a shunt regulator be
added to the unit.
Amplifier Faults ("ENABLE
" LED de-energizes).
1. RMS current exceeded - run at 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.
6.2. Ndrive HP Control Board Test Points
The following test point is available on the control board internal to the Ndrive HP. The
internal power board has no test points.
Table 6-2.
Ndrive HP Control Board Test Points
Test Point
Function
TP4
Signal Common (Analog and Digital)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
