vi 
6.3
 
If an Alarm Code Appears on the LED Monitor .................................................................................. 6-3
 
6.3.1  Alarm code list ............................................................................................................................... 6-3 
6.3.2  Causes, checks and measures of alarms ..................................................................................... 6-6 
[ 1 ] 
cof
    PID feedback wire break ................................................................................................ 6-6 
[ 2 ] 
dba
 Braking transistor broken ............................................................................................... 6-6 
[ 3 ] 
dbh
 Braking resistor overheat ............................................................................................... 6-6 
[ 4 ] 
ecf
 EN circuit failure ............................................................................................................. 6-7 
[ 5 ] 
ecl
 Customizable logic failure .............................................................................................. 6-7 
[ 6 ] 
ef
 Ground fault ..................................................................................................................... 6-7 
[ 7 ] 
er1
 Memory error ................................................................................................................. 6-7 
[ 8 ] 
er2
 Keypad communications error ....................................................................................... 6-8 
[ 9 ] 
er3
 CPU error ...................................................................................................................... 6-8 
[ 10 ] 
er4
 Option communications error ......................................................................................... 6-8 
[ 11 ] 
er5
 Option error ................................................................................................................... 6-8 
[ 12 ] 
er6
    Operation error .............................................................................................................. 6-9 
[ 13 ] 
er7
 Tuning error ................................................................................................................... 6-9 
[ 14 ] 
er8  
RS-485 communications error (Communications port 1)/   
erp  
RS-485 communications error (Communications port 2) ............................................. 6-10 
[ 15 ] 
erd
 Step-out detection/detection failure of magnetic pole position at startup ...................... 6-11 
[ 16 ] 
ere
 Speed inconsistency / Excessive speed deviation ....................................................... 6-12 
[ 17 ] 
erf
 Data saving error during undervoltage ......................................................................... 6-13 
[ 18 ] 
erh
 Hardware error ............................................................................................................. 6-13 
[ 19 ] 
ero
 Positioning control error ............................................................................................... 6-13 
[ 20 ] 
err 
  Simulated failure .......................................................................................................... 6-14 
[ 21 ] 
ert
 CAN communications failure ........................................................................................ 6-14 
[ 22 ] 
fus
 DC fuse-blowing .......................................................................................................... 6-14 
[ 23 ] 
lin
 Input phase loss ........................................................................................................... 6-15 
[ 24 ] 
lu
 Undervoltage .................................................................................................................. 6-15 
[ 25 ] 
0cn
 Instantaneous overcurrent ........................................................................................... 6-16 
[ 26 ] 
0h1
 Cooling fin overheat ..................................................................................................... 6-17 
[ 27 ] 
0h2
 External alarm.............................................................................................................. 6-17 
[ 28 ] 
0h3
 Inverter internal overheat ............................................................................................. 6-17 
[ 29 ] 
0h4
 Motor protection (PTC thermistor) ............................................................................... 6-18 
[ 30 ] 
0h6
 Charging resistor overheat ........................................................................................... 6-18 
[ 31 ] 
0ln 
  Motor overloads 1 to 2 ................................................................................................. 6-19 
[ 32 ] 
0lu  
Inverter overload .......................................................................................................... 6-20 
[ 33 ] 
0pl 
 Output phase-failure detection ..................................................................................... 6-20 
[ 34 ] 
0s
 Overspeed protection ..................................................................................................... 6-21 
[ 35 ] 
0un
 Overvoltage ................................................................................................................. 6-21 
[ 36 ] 
pbf
 Charge circuit fault ....................................................................................................... 6-22 
[ 37 ] 
pg
 PG wire break ................................................................................................................ 6-22 
6.4
 
If the “Light Alarm” Indication (
l-al
) Appears on the LED Monitor ................................................ 6-23
 
6.5
 
When Codes Other Than Alarm Codes and Light Alarm Indication (
l-al
) are Displayed ............. 6-24
 
6.5.1  Abnormal motor operation ........................................................................................................... 6-24 
[ 1 ]  The motor does not rotate ...................................................................................................... 6-24 
[ 2 ]  The motor rotates, but the speed does not increase .............................................................. 6-26 
[ 3 ]  The motor runs in the opposite direction to the command ...................................................... 6-27 
[ 4 ]  Speed fluctuation or current oscillation (e.g., hunting) occurs during running   
at constant speed ................................................................................................................... 6-28
 
[ 5 ]  Unpleasant noises are emitted from motor or noises fluctuate ............................................... 6-29 
[ 6 ]  Motor is not accelerated or decelerated according to set-up acceleration   
or deceleration times .............................................................................................................. 6-29
 
[ 7 ]  The motor does not restart even after the power recovers from a momentary power failure .. 6-30 
[ 8 ]  Motor generates heat abnormally ........................................................................................... 6-30