Omron M1 Series User Manual page 755

Alarm
Alarm
sub-
code
code
1
3
2
(LU)
M1 Series Standard Type User's Manual (I669)
Name Description
(1) Momentary power
failure occurred
(2) Short interval when
cycling power (if F14=1)
(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-
Undervoltage
phase 200 V: 160 VDC)
(4) Equipment damage
or miswiring in power
supply circuit
(5) A large starting cur-
rent flows to a different
load connected to the
same power supply,
and the power supply
voltage temporarily
drops
(6) Insufficient capacity
in the power supply
transformer resulting in
drop in power supply
voltage due to inverter
inrush current.
9 Troubleshooting
Check point and remedy reference
→ Cancel the alarm.
→ To restart without an alarm, set the
Power Interruption Restart Mode Selec-
tion (F14) data to 3, 4, or 5 depending
on the type of load.
Check if the power supply has been turned
ON with the control power supply already
ON (determine using Digital Operator dis-
play).
→ Turn the power supply ON again after
the Digital Operator display has gone
out.
Measure the input voltage.
→ Increase the power supply voltage to
within the specified range.
Measure the input voltage and identify the
damaged equipment or miswiring.
→ Replace damaged equipment, or repair
miswiring.
Measure the input voltage, and check for
voltage fluctuations.
→ Review the power supply system.
Check that an alarm occurs when the mold-
ed case circuit breaker, ground leakage cir-
cuit breaker (with overcurrent protection
function), and magnetic contactor are on.
→ Review the power supply transformer
capacity.
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