Alarm
code
Alarm
subcode
Name Description 　Check point and remedy reference
01 Hex
(during ac-
celeration)
(0C1)
02 Hex
(during de-
celeration)
(0C2)
03 Hex
(during con-
stant speed
operation)
(0C3)
(0Cn)
0000 Hex
Instantaneous
overcurrent
(1) Short in inverter
output
Remove wiring from the inverter output termi-
nal (U, V, W), and measure the resistance
between motor wiring phases. Check for
phases with very low resistance.
→
Remove the shorted section (including
replacement of wiring, relay terminals,
and motors)
If an overcurrent 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
.
(2) Inverter output
terminal has a
ground fault
Remove wiring from the inverter output termi-
nal (U, V, W), and perform a megger test.
→
Remove ground faults (including re-
placement of wiring, relay terminals, and
motors).
If an overcurrent 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
.
(3) High load Measure current going in to the motor, estab-
lish current trends, and determine if this is
larger than the load calculation values de-
signed in to the system.
→ If overload, either decrease the load or
increase the inverter capacity.
Check current trends, and check if there are
rapid changes in current.
→
If the current changes rapidly, either de-
crease the load or increase the inverter
capacity.
→
Enable instantaneous overcurrent limit-
ing (3008Hex-0DHex = 1).
(4) Large torque
boost (If manual tor-
que boost
(3004Hex-26Hex* =
0, 1, 3, 4))
Check if the current drops when 1st Manual
Torque Boost V
oltage (3004Hex-0AHex*) is
lowered, or if there is a stall.
→ If it is determined that there is no stall,
lower 3004Hex-0AHex*.
9 Troubleshooting
9-15
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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