10 - 19
3 Troubleshooting
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
10-4 Troubleshooting
10
An Overvoltage protection
alarm (E07) occurs during
deceleration.
The set deceleration time is
too short.
Increase the value set in the 1st/2nd/3rd
Deceleration Time 1/2
(F003/F203/F303/A093/A293/A393).
7-15
The Overvoltage Suppression
Function Selection During
Deceleration (b130) is set to
00 (Disabled).
Set the Overvoltage Suppression Function
Selection During Deceleration (b130) to 01 or 02 to
enable the overvoltage suppression function.
However, when this function is enabled, the actual
deceleration time may be longer than the set value.
For details, refer to Overvoltage Suppression
Function during Deceleration on page 7-106.
7-106
If the Overvoltage protection alarm (E07) still occurs during deceleration when the Overvoltage
Suppression Function Selection During Deceleration (b130) is set to 01 or 02 (Enabled), refer
to the following information.
The Overvoltage Suppression
Proportional Gain During
Deceleration
(b133)/Overvoltage
Suppression Integral Time
During Deceleration (b134)
value is inappropriate.
Change the set values. For details, refer to
Overvoltage Suppression Function during
Deceleration on page 7-106.
7-106
The Overvoltage Suppression
Level During Deceleration
(b131) is too high.
Decrease the Overvoltage Suppression Level
During Deceleration (b131). Note, however, that
setting an excessively small value may disable
deceleration. Consider that the minimum value is:
Incoming voltage x √2 x 110%.
A Thermistor error (E35)
occurs.
24-VDC voltage is input to the
external thermistor input
terminal TH.
Deallocate the external thermistor function from the
terminal TH.
2-16
The output frequency is
unstable.
The parameter settings are
inappropriate.
Change the output frequency value slightly away
from the power supply frequency.
7-14
Change the 1st/2nd/3rd Stabilization Parameter
(H006/H206/H306) value.
7-146
The load changes
significantly.
Increase the motor/inverter capacity. –
The power supply voltage
fluctuates.
Take measure to reduce the fluctuation.
The output torque is
insufficient.
The acceleration/constant
speed parameter settings are
inappropriate.
Increase the 1st/2nd/3rd Manual Torque Boost
Voltage (A042/A242/A342)/1st/2nd/3rd Manual
Torque Boost Frequency (A043/A243/A343) value.
7-31
Set the 1st/2nd Torque Boost Selection
(A041/A241) to 01 (Automatic torque boost).
Decrease the Carrier Frequency (b083). 7-94
Set the 1st/2nd Control Method (A044/A244) to 03
(SLV: Sensorless vector control).
7-34
The 1st/2nd/3rd Deceleration
Time 1 (F003/F203/F303)/
1st/2nd/3rd Deceleration
Time 2 (A093/A293/A393)
settings are inappropriate.
Increase the value set in the 1st/2nd/3rd
Deceleration Time 1/2
(F003/F203/F303/A093/A293/A393).
7-15
Set the AVR Selection (A081) to 01 or 02 (OFF). 7-51
Use braking resistors or regenerative braking units. 2-39
Symptom Possible cause Remedy
Reference
page
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