Chapter 14 Fault CodesMH300
ID No.
Display Fault Name Description
87
Overload protection
at low frequency
(oL3)
Low frequency and high current protection
Action and Reset
Action condition Software detection
Action time Immediately act
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Immediately reset
Record Yes
Cause Corrective Actions
The drive operates at a
frequency below 15 Hz, and
output current is too large.
1. Enhance the heat dissipation capacity for the cabinet.
2. Lower the carrier frequency (Pr.00-17).
3.
Decrease the voltage settings that correspond to frequency below 15
Hz in the V/F curve.
4. Change Pr.00-11 to general control mode.
5. Replace the drive with a larger power model.
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