68
Fault
code
Display
code
Fault description
Possible reasons
Actions
Output phase loss or some
other reasons result in current
waveform abnormalities
Check the wiring
Charge voltage damaged,
inverter voltage undervoltage
Seek service
Straight bridge arm
Seek service
Panel abnormal
Seek service
F.oH1
Inverter module
heatsink overheat
Ambient over-temperature
Lower the ambient
temperature
Obstruction of ventilation
channel
Clear the ventilation
channel
Fan does not work
Replace the fan
Inverter fault
Seek service
F.oH2
Reserved
Reserved Reserved
F.oL1
Inverter overload
Too short Acc time
Prolong Acc time
Too large DC braking energy
Reduce DC braking
current, prolong
braking time
Improper V/F curveV/F
Adjust V/F curve or
torque boost value
The inverter is re-started with
a rotating motor
Start when the motor
stops
Low AC supply voltage
Check the AC supply
voltage
Too heavy load
Select the inverter with
larger power
F.oL2
Motor Overload
Improper V/F curveV/F
Set V/F curve and
torque boost value
correctly
Low AC supply voltage
Check the AC supply
voltage
Common moter operating at
low speed, large load for long
time
Select special motor for
such operating
condition
Incorrect setting of motor
overload protection factor
Correct the setting
Motor blocked or load sudden
change
Check the load