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Troubleshooting
Note: This fault is detected when the drive output current exceeds the overcurrent point.
Code
Name
Constant
speed
E.OC3
overcurrent fault
Note: This fault is detected when the drive output current exceeds the overcurrent point.
Code
Name
Accelerating
E.OU1
overvoltage fault
Note: This fault is detected when the bus voltage exceeds the overvoltage point. The overvoltage point is 820V for three-phase input and 400V for single-
phase input.
Code
Name
Overvoltage fault during
E.OU2
deceleration
Note: This fault is detected when the bus voltage exceeds the overvoltage point. The overvoltage point is 820V for three-phase input and 400V for single-
phase input.
Code
Name
Constant
E.OU3
overvoltage fault
Note: This fault is detected when the bus voltage exceeds the overvoltage point. The overvoltage point is 820V for three-phase input and 400V for single-
phase input.
Code
Name
Shutdown
overvoltage
E.OU4
fault
Note: This fault is detected when the bus voltage exceeds the overvoltage point. The overvoltage point is 820V for three-phase input and 400V for single-
phase input.
Code
Name
Undervoltage
E.LU
operation
Note: This fault is detected when the bus voltage is lower than the undervoltage protection point (F10.19) while the drive is running.
Code
Name
Reason
Excessive load
Motor
E.OL1
overload
Whether the acceleration and deceleration time settings are
AC10 Series Frequency Inverter Technical Manual
Deceleration time is too short
Drive output cable exceeds the maximum allowed
Malfunction caused by interference
Reason
Excessive load
Short circuit on the output side of the drive or short
circuit to ground
Motor damage
Drive output cable exceeds the maximum allowed
Malfunction caused by interference
Reason
Power supply voltage is too high
Drive output or motor short to ground
Acceleration time is too short
Large braking load
Surge voltage mixed in the input voltage
Improper setting of speed tracking parameters
Reason
Power supply voltage is too high
Drive output or motor short to ground
Deceleration time is too short
Large braking load
Surge voltage mixed in the input voltage
Improper setting of speed tracking parameters
Reason
Power supply voltage is too high
Drive output or motor short to ground
speed
Large braking load
Surge voltage mixed in the input voltage
Improper setting of speed tracking parameters
Reason
Power supply voltage is too high
Drive output or motor short to ground
Surge voltage mixed in the input voltage
Reason
Power outage or instantaneous power outage
Input power phase loss
in
Input voltage fluctuation is too large
Increase F01.23 [Deceleration time]
Replace the large capacity drive
Shorten the output cable or increase the output reactor
Check wiring of control circuit, main circuit and ground to
eliminate interference sources
Countermeasures
Reduce load or replace large capacity drive
Impact load needs to reduce the load change frequency or
replace the larger capacity drive
Check the main circuit to eliminate the short circuit
Measure the resistance between the motor wires and
replace the motor immediately if it is turned on.
Shorten the output cable or increase the output reactor
Check wiring of control circuit, main circuit and ground to
eliminate interference sources
Countermeasures
Reduce the supply voltage to the specified range
Check main circuit wiring to eliminate short circuit
Determine if the fault is detected when the sudden
acceleration stops
Increase F01.22 [acceleration time]
Brake resistor device
Adding reactor on the input side
Modify
the
(F07.25~F07.28)
Countermeasures
Reduce the supply voltage to the specified range
Check main circuit wiring to eliminate short circuit
Increase F01.23 [Deceleration time]
Brake resistor device
Brake resistor device
Adding reactor on the input side
Modify
the
(F07.25~F07.28)
Countermeasures
Reduce the supply voltage to the specified range
Check main circuit wiring to eliminate short circuit
Brake resistor device
Adding reactor on the input side
Modify
the
(F07.25~F07.28)
Countermeasures
Reduce the supply voltage to the specified range
Check main circuit wiring to eliminate short circuit
Adding reactor on the input side
Countermeasures
Reset and restart after checking the power supply
Confirm main circuit wiring
Improve the power supply to meet the rated voltage of the
drive
If there is no problem with the main circuit power supply,
check if there is a problem with the electromagnetic
contactor on the main circuit side.
Countermeasures
Reduce the load
Appropriate increase of motor overload protection curve
coefficient
Increase F01.22, F01.23 [addition and deceleration time]
42
speed
tracking
related
parameters
speed
tracking
related
parameters
speed
tracking
related
parameters
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