Symptom Possible cause Remedy
Refer-
ence
page
The motor or ma-
chine causes a loud
noise.
The carrier frequency is too low. Increase Carrier Frequency
(3004Hex-1BHex). However, this may in-
crease noise or leakage current from the
inverter
. In addition, the output current
must be derated depending on the model.
For details, refer to A-7 Derating Table on
page A-287.
page
8-99
page
A-287
The frequency of the motor in
rotation resonates with the ma-
chine's natural frequency.
Change the frequency setting. If resonance
occurs during acceleration/deceleration,
use the Jump Frequency (3006Hex-02Hex
to 3006Hex-05Hex) to avoid the resonance
frequency.
page
8-102
The motor is overexcited.
Set 1st Base Frequency
(3004Hex-05Hex)/2nd Base Frequency
(3009Hex-03Hex), 1st Rated Voltage at
Maximum Output Frequency
(3004Hex-07Hex)/2nd Rated V
oltage at
Maximum Output Frequency
(3009Hex-05Hex) according to the motor
ratings. If this does not improve the condi-
tion, slightly lower the 1st Rated Voltage at
Base Frequency (3004Hex-06Hex)/2nd
Rated Voltage at Base Frequency
(3009Hex-04Hex) value. Or set 1st Drive
Control Selection (3004Hex-2BHex)/2nd
Drive Control Selection (3009Hex-0FHex)
to “0: V/f control (No slip compensation),”
or, if using “V/f control with speed sensor,”
use Non-linear V/f Frequency 1
(301FHex-43Hex)/Non-linear V/f Voltage 7
(301FHex-50Hex) and perform tuning.
page 6-8
page
6-17
The inverter trips
with an overcurrent
protection (alarm
code: 19).
The thermistor trip is not set ap-
propriately.
Disable Thermistor Function Selection
(MOH) (3008Hex-1BHex). Alternatively, ad-
just 1st Thermistor Error Detection Level
(MOH) (3008Hex-1CHex).
page
8-77
The inverter trips
with an overvoltage
protection (alarm
code: 06, 07, 08)
during deceleration.
The set deceleration time is too
short.
Increase the deceleration time
(3004Hex-09Hex/3005Hex-0CHex/
3005Hex-0EHex/3005Hex-10Hex).
page
6-33
page
6-37
Anti-regenerative Control Func-
tion Selection
(3008Hex-46Hex) is set to “0:
Disable.”
Enable Anti-regenerative Control Function
Selection (3008Hex-46Hex). However,
when this function is enabled, the actual
deceleration time may be longer than the
set value. For details, refer to
8-8-2 Anti-re-
generative Control Function on page 8-74.
page
8-74
If an overvoltage trip occurs during deceleration although Anti-regenerative
Control Function Selection (3008Hex-46Hex) is enabled:
The Frequency Rising Limit for
Torque Limit (3008Hex-4DHex)
value is inappropriate.
Change the set values. For details, refer to
8-8-2 Anti-regenerative Control Function
on page 8-74.
page
8-74
9 Troubleshooting
9-34
M1 Series EtherCAT Type User’s Manual (I670)
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