
TMP High Performance Vector Control Inverter User Manual
110
Failur
e No
Failure
code
Failure description
Potential causes
Solutions
Acceleration time is too short
Lengthen acceleration time
Set V/F curve ratio too large
Adjust V/F curve setting and
torque boost
Power level of inverter is small
Replace with inverter with proper
model
2
oc2
Over current
protection when
deceleration
operation
Low grid voltage
Check input power supply
Rotating inertial of load is too large
Choose appropriate energy
braking components
Improper setting of motor
parameters
Set motor parameters properly
Deceleration time is too short
Lengthen deceleration time
Power level of inverter is small
Replace to inverter with proper
model
3
oc3
Over current
protection when
operation with
constant speed
Sudden change of load during
operation
Decrease load’s abrupt frequency
change and amplitude
Improper
setting
of
motor
parameters
Set motor parameters properly
Power level of inverter is small
Replace to inverter with proper
model
4
occ1
Igbt module protection
in Acc process
Low grid voltage
Check input power supply
Startup too fast during motor
operation
Restart after the motor stops
rotating
Rotating inertial of load is very large
and shock load is very heavy
Increase the acceleration time
and reduce the occurrences of
sudden change of load
Improper setting of motor
parameters
Set motor parameters properly
Set start-up frequency too high
Decrease start-up frequency
Acceleration time is too short
Lengthen acceleration time
Set V/F curve ratio too large
Adjust V/F curve setting and
torque boost
Power level of inverter is small
Replace with inverter with proper
model
5
occ2
Igbt module protection
in Dec process
Low grid voltage
Check input power supply
Rotating inertial of load is too large
Choose appropriate energy
braking components
Improper setting of motor
parameters
Set motor parameters properly
Deceleration time is too short
Lengthen deceleration time
Power level of inverter is small
Replace to inverter with proper
model
6
occ3
Igbt module protection
in constant speed
process
Sudden change of load during
operation
Decrease load’s abrupt frequency
change and amplitude
Improper
setting
of
motor
parameters
Set motor parameters properly
Power level of inverter is small
Replace to inverter with proper
model
10
ou1
Over voltage
protection when
acceleration
operation
Motor short to ground
Check motor wiring
Abnormal input power supply voltage
Check input power supply
Fast start-up again when motor
operates with high speed
Start again after the motor stop
rotating
11
ou2
Over voltage
Motor short to ground
Check motor wiring