Appendix 2 Alarm Code List
Alarm Code List
218
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.
SCP
Short circuit
over-current
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
inverter is damaged.
OL2
Abnormal
over-torque
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.
bE
Abnormal
brake-resistor
(Abnormal relay)
Abnormal brake-resistor
(Abnormal relay)
Return it to the factory for repair.
IPF
Abnormal power
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.
AEr
Abnormal 4-5
terminal
Abnormal disconnection of 4-5
terminal’s analog output
Please refer to the description
for P.184.
PG1
Abnormal
encoder model
Abnormal encoder model
Check the set value of P.351.
PG2
Abnormal PG
card feedback
signals
Abnormal PG card feedback
signals
Please refer to the feedback control
parameter description
for P.350~P.354.
