HV350 Mini Frequency Inverter User Manual
101
about the failure, such as output frequency, frequency setting, output current, rotating
direction, operating condition, and the 3 latest faults, which is shown in the table below.
Fault code
Display content
Description
PH.06
Fault code
1st fault type
PH.07
2nd fault type
PH.08
3rd fault type
PH.09
Date
(With unit)
Bus voltage at last fault
PH.10
Output current at last fault
PH.11
Frequency setting at last fault
PH.12
Running frequency at last fault
PH.13
I/0 terminal‘s state at last fault
7.2 List of Fault and Alarm Information
HV350 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.
Failur
e No
Failure
code
Failure description
Potential causes
Solutions
1
oc1
Over current
protection when
acceleration
operation
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
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