9-1-3
Minor Fault Code List
Alarm
code
Alarm
subcode
Name Description Check point and remedy reference
(CnT)
Equipment
service life
(number of
startups)
(1) Equipment service
life (number of start-
ups)
Displayed when the motor number of start-
ups reaches the number set in 1st Preset
Startup Count for Motor Maintenance
(H79).
Additionally, the current number of startups
can be confirmed in 1st Startup Count for
Motor (H44), therefore before reset, set
H44 data to 0000.
(LiF)
Life prediction (1) Life prediction
Any one of the main circuit capacitor used
in the inverter, the capacitors on the printed
circuit board, and the cooling fan has
reached the end of its life.
Referring to 7-8-10
Capacitor Life Warning
Signal (WAC) on page 7-96, 7-8-13 Cool-
ing Fan Life Warning Signal (WAF) on
page 7-99 and 7-8-14 Lifetime Alarm
(LIFE) on page 7-100, check the status of
consumable parts.
(0H)
Cooling fin
overheat pre-
diction
(1) Cooling fin over-
heat prediction
Displayed as a prediction before the cool-
ing fine overheat trip OH1 occurs.
For measures, refer to “OH1 Heat sink
overheat ( page 9-17).”
(0L)
Motor overload
prediction
(1) Motor overload pre-
diction
Displayed as a prediction prior to a motor
overload 0l1 alarm occurring, and sets the
current value at which the Overload early
warning 2 Level (OL2) (E34) operates.
Check that the actual current flowing in the
motor is not higher than the value set in
E34.
(Pid)
PID warning
output
(1) PID warning output
Displayed when a warning (warning from
absolute value, warning from PID error) is
output during PID operation. For details, re-
fer to PID Deviation Excessive (OD) on
page 7-133.
(rEF)
Command loss (1) Command loss
When the analog frequency setting (termi-
nals AI1, AI2(AII), AI2(AIV)) command sud-
denly decreases to 10% or less, it is judged
to be a wire break and ref is displayed.
Check the wiring.
(rTE)
Equipment
service life (cu-
mulative opera-
tion time of mo-
tor)
(1) Equipment service
life (cumulative opera-
tion time of motor)
Displayed when the cumulative operation
time of motor reaches the time set in pa-
rameter H78 (Maintenance interval). Cu-
mulative motor run time can be checked in
H94* (Cumulative operation time of motor).
This can also be reset by setting the H94*
value to 0.
(LoK)
Password can-
cellation error
(1) User password 1 or
2 entered incorrectly 5
times.
Cancel the alarm.
→ Turn OFF the inverter power supply,
then turn ON the power supply again.
Or 20 minutes elapse.
9 Troubleshooting
9-25
M1 Series Standard Type User's Manual (I669)
9-1 Alarm Display and Remedies
9
9-1-3 Minor Fault Code List
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