Appendix 2 Alarm Code List
Code Screen Display Causes Troubleshooting
CPU
Abnormal CPU
Serious peripheral
electromagnetic interference
Reduce peripheral interference.
OLS
Stall prevention
and protection
Over-loaded motor
1. Reduce motor load.
2. Increase P.22 value.
Short circuit
Output-end short circuit
Check whether the inverter output
has short circuit (e.g., the motor
wiring).
NTC
Overheated
module
The temperature of the IGBT
module is too high.
1. Reduce the environment
temperature and improve the
air condition.
2. Check whether the fan of the
Abnormal
1. Over-loaded motor
2. P.155, P.156
set
unreasonably.
1. Reduce motor load.
2. Adjust the set value
of P.155, P.156
properly.
Abnormal
brake-resistor
Abnormal brake-resistor
(Abnormal relay)
Return it to the factory for repair.
supply input
Abnormal power supply input
Check whether power supply input
is normal.
CPr
Abnormal CPU
Abnormal PU procedures
1. Check the wiring.
2. Check the parameter setup.
3. Reduce peripheral
interference.
Abnormal 4-5
Abnormal disconnection of 4-5
terminal’s analog output
Please refer to the description
for P.184
.
Abnormal
Abnormal encoder model Check the set value of P.35 1
.
Abnormal PG
card feedback
Abnormal PG card feedback
signals
Please refer to the feedback control
parameter description
for P.350~P.354
.