Best E5 Series User Manual page 182

Chapter 6 Trouble Shooting Easures
Table of Fault Codes
Fault Fault
code Display
1 oC1
2 oC2
3 oC3
Fault
description
Torque boost is too big
under V/f control
Starting frequency is too
high
Accel time is too short
Motor parameters are
improperly set
Accel
Output short circuit
overcurrent
(phase-to-phase short
circuit or output ground
short circuit)
Overload is too heavy
Inappropriate V/f curve
under V/f control
Restart the rotating
motor
Output short circuit
(phase-to-phase short
circuit or output ground
short circuit)
Constant-s
Overload is too heavy
peed
overcurrent
Power rating of the drive
is relatively small
Input voltage is too low
Output short circuit
(phase-to-phase short
circuit or output ground
short circuit)
Decel
Load inertia is too big
overcurrent
Decel time is too short
Input voltage is too low
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Causes
E5 User Manual
Solutions
Reduce torque boost
value
Drop starting frequency
Prolong the Accel time
Set the parameters
correctly according to
motor nameplate
Check motor
connection and output
ground impedance
Reduce the load
Set V/f curve correctly
Reduce current limited
value or start through
speed search
Check motor
connection and output
ground impedance
Reduce the load
Select appropriate drive
power rating
Check power grid
voltage
Check motor
connection and output
ground impedance
Use dynamic brake
Prolong the Decel time
Check power grid
voltage