Santerno SINUS MINI Series - List of Fault and Alarm Information

SINUS MINI High performance Vector Control Inverter User Manual
46
5.2 List of Fault and Alarm Information
SINUS MINI serial inverter is equipped with complete protection functions to provide efficient protection
while utilizing its performance sufficiently. Some failure instructions may be displayed during operation.
compare the instructions with the following table and analyze, decide the causes and solve failures.
For damages on units or questions that can’t be resolved, please contact with local distributors/agents,
service centers or manufacturer for solutions.
Failure
No
Failure
code
Failure
description
Potential causes
Solutions
1
oc1
Over current
protection when
acceleration
operation
Low grid voltage
Check input power supply
Start-up 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
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
Start-up 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