59
7.
Troubleshooting
All the possible faults of HV950 have been given in Table 7-1. Fault code range is
F.oC1
～
F.tU. You can user can check thefaults according to the following table and
record detailed fault phenomena before seeking service. Please contact the
salesdistributor when you need technical supports.
Table 7-1 Fault Information and Diagnosis
Fault
code
Display
code
Fault description
Possible reasons
Actions
F.oC1
.
Over-current in
Acc process
Too short Acc time
Prolong the Acc time
V/F curve is not suitable
Check and adjust V/F
curve, adjust torque boost
or set the motor
parameters correctly to
ensure the normal auto
torque boost works well.
Low AC supply voltage
Check the inverter’s input
AC supply
Moment of inertia of the load
is too large, heavy impact
load
Reduce the load of
mutations,prolong the Acc
time
The rotating motor re-starts
after the inverter stops
instantly
Start when the motor
absolutely stops
Motor parameter setting is
not normal
Properly set motor
parameters
Inverter power is too small
Select a higher power
inverter
F.oC2
.
Over-current in
Dec process
Too short Dec time
Prolong the Dec time
Load inertia is too high
Connect suitable braking
device
Too low inverter’s power
Select the inverter with
larger capacity
F.oC3
.
Over-current in
constant speed
operation
Sudden change of load
Reduce the change of the
load
Too short Acc/Dec time
Prolong Acc/Dec time
Abnormal load
Check the load
Low AC supply voltage
Check the AC supply
voltage
Too low inverter’s power
Select the inverter with
larger capacity
F.oU1
.
Over voltage in
Acc process
Abnormal AC supply voltage
Check the AC supply
voltage
Too short Acc time
Prolong the Acc time
The inverter is re-started with
a rotating motor
Start when the motor stops
