Alarm
code
Alarm
sub-
code
Name Description Check point and remedy reference
(Lin)
Input phase
loss
(1) Main power supply
input terminal wiring
disconnected
Measure the input voltage.
→ Repair or replace the main power sup-
ply input wiring or input equipment
(molded case circuit breaker, magnetic
contactor, etc.)
(2) Loose main power
supply input terminal
connection
Check if main power supply input terminal
screws are loose.
→
Tighten to the recommended tightening
torque.
(3) High phase imbal-
ance in three-phase
power supply
Measure the input voltage.
→ Install an AC reactor (ACR) to reduce
the phase imbalance.
→ Increase the inverter capacity.
(4) Frequent excessive
load
Measure the ripple waveform of the Main
Circuit DC V
oltage.
→ If a ripple in the Main Circuit DC V
olt-
age is high, increase the inverter ca-
pacity.
(5) Three-phase power
supply connected to a
product with three-
phase power supply
specifications
Recheck the inverter model.
→ Reselect an inverter matching the pow-
er supply specifications.
(LoK)
Password can-
cellation error
(1) User password 1 or
2 entered incorrectly
more than a specified
number of times
Cancel the alarm.
→ Turn OFF the inverter power supply,
then turn ON the power supply again.
Or 20 minutes elapse after the occur-
rence of the error
.
If you have forgotten the password.
→
Set Data Initialization (H03) to 1 and
execute parameter initialization.
9 Troubleshooting
9-14
M1 Series Standard Type User's Manual (I669)
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