Alarm
code
Alarm
subcode
Name Description 　Check point and remedy reference
0A Hex
(LU)
1
Undervoltage
(1) Momentary power
failure occurred
→ Cancel the alarm.
3
→ To restart without an alarm, set the Pow-
er Interruption Restart Mode Selection
(3004Hex-0FHex) data to 3, 4, or 5 de-
pending on the type of load.
2
(2) Short interval
when cycling power
(if 3004Hex-0FHex =
1)
→ Increase the interval for turning the pow-
er supply OFF then back ON.
0000 Hex
(3) The power supply
voltage has not
reached the inverter
specification range
(three-phase 200 V:
180 VDC/three-
phase 400 V: 360
VDC/single-phase
200 V: 160 VDC)
Measure the input voltage.
→ Increase the power supply voltage to
within the specified range.
(4) Equipment dam-
age or miswiring in
power supply circuit
Measure the input voltage and identify the
damaged equipment or miswiring.
→ Replace damaged equipment, or repair
miswiring.
(5) A large starting
current flows to a dif-
ferent load connect-
ed to the same pow-
er supply
, and the
power supply voltage
temporarily drops
Measure the input voltage, and check for
voltage fluctuations.
→
Review the power supply system.
(6) Insufficient ca-
pacity in the power
supply transformer
resulting in drop in
power supply voltage
due to inverter inrush
current.
Check that an alarm occurs when the molded
case circuit breaker, ground leakage circuit
breaker (with overcurrent protection func-
tion), and magnetic contactor are on.
→
Review the power supply transformer
capacity.
9 Troubleshooting
9-14
M1 Series EtherCAT Type User’s Manual (I670)
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