Fault
code
Type of
faults
Possible
fault reasons
Troubleshooting
E-01
Acc over
current
Acc time is too short
Adjust acc time
V/F curve setup is not suitable
Adjust V/F curve
Restart the motor in running
Setup start mode as speed
tracking restart
Torque boost setup is too big
Adjust torque boost or set as
auto mode
VFD capacity is too low
Select VFD with proper capacity
E-02
Dec over
current
Dec time is too short
Adjust Dec time
Potential load or load inertia is
too big
Add suitable braking device
VFD capacity is too low
Select VFD with proper capacity
E-03
Over current
at constant
speed
running
Load mutation
Check load
Acc or Dec timeis too short
Adjust Acc or Dec time
Input voltage abnormal
Check input power supply
Load abnormal
check load
VFD capacity is too low
Select VFD with proper capacity
E-04
Acc
overvoltage
Input voltage abnormal
Check input power supply
Acc time is too short
Adjust Acc time
Restart the motor in running
Setup start mode as speed
tracking restart
E-05
Dec
overvoltage
Dec time is too short
Adjust the Dec time
Potential load or load inertia is
too big
Add suitable braking device
E-06
Overvoltage
at constant
speed
running
Input voltage abnormal
Check input power supply
Acc or Dec time is too short
Adjust the Acc or Dec time
Abnormal change of input
voltage
Mount input reactor
7. Troubleshooting
7.1
Fault Alarm and Troubleshooting
When the VFD is abnormal, protection function acts: LED displays fault code and the
content, fault relay acts, the VFD stops output and the motor coasts to stop.
VFD-1P-220.240-1HP-7A-DCM
VFD’s fault contents and troubleshooting is shown
in Table 7-1. After fault alarm occurs, fault phenomenon should be recorded in detail,
the fault should be processed according to Table 7-1. When in need of technical
assistance, please contact your supplier.
Larson Electronics, LLC
Phone:
Fax: (903) 498-3364
www.larsonelectronics.com
38
of
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VFD-1P-220.240-1HP-7A-DCM
(877) 348-9680