Alarm
code
Alarm
subcode
Name Description 　Check point and remedy reference
06 Hex
(during ac-
celeration)
(0U1)
07 Hex
(during de-
celeration)
(0U2)
08 Hex
(during con-
stant speed
operation)
(0U3)
(0Un)
0000 Hex Overvoltage
(3) Short decelera-
tion time for the mo-
ment of inertial of the
load.
Recalculate the deceleration torque from the
moment of inertia of the load and the decel-
eration time.
→ Lengthen the deceleration time
(3004Hex-09Hex, 3005Hex-0CHex,
3005Hex-0EHex, 3005Hex-10Hex,
3008Hex-39Hex).
→ Enable Anti-regenerative Control Func-
tion Selection (3008Hex-46Hex) or
Over-Excitation Control Selection during
Deceleration Function Selection
(3008Hex-48Hex).
→ Enable torque limit (3004Hex-29Hex,
3004Hex-2AHex, 3005Hex-1
1Hex,
3005Hex-12Hex).
→ Set 1st Rated Voltage at Base Frequen-
cy (3004Hex-06Hex*) to 0, and increase
braking performance.
→ Consider use of braking resistor.
(4) Short accelera-
tion time
Check if an overvoltage alarm occurs at the
end of sudden acceleration.
→ Lengthen the acceleration time
(3004Hex-08Hex, 3005Hex-0BHex,
3005Hex-0DHex, 3005Hex-0FHex).
→ Use Acceleration/Deceleration Pattern
Selection (3008Hex-08Hex).
→ Consider use of braking resistor.
(5) High braking load Compare load braking torque and inverter
braking torque.
→ Set 1st Rated Voltage at Base Frequen-
cy (3004Hex-06Hex*) to 0, and increase
braking performance.
→ Consider use of braking resistor.
(6) Output has a
ground fault
If this operates correctly when run with wiring
removed from the inverter output terminal (U,
V
, W).
→
Check that the output wiring or the mo-
tor do not have a ground fault.
If an overvoltage is displayed when run with
wiring removed from the inverter output ter-
minal (U, V, W).
→
This indicates an inverter fault possibili-
ty. Replace the inverter
.
(7) Malfunction be-
cause of noise
Check that the Main Circuit DC Voltage at
the time of overvoltage is at or below the
overvoltage level.
→ Implement measures against noise.
→ Enable Retry Count at Trip
(3008Hex-05Hex).
→ Connect a surge absorber to coils, sole-
noids, etc. in magnetic contactors that
are the cause of noise.
9 Troubleshooting
9-23
M1 Series EtherCAT Type User’s Manual (I670)
9-1 Alarm Display and Remedies
9
9-1-2 Alarm Code List
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