Chapter 6
TROUBLESHOOOTING
This chapter describes troubleshooting procedures to be followed when the inverter malfunctions or detects an
alarm or a warning condition.
Contents
6.1 Protective Functions ······························································································· 6-1
6.2 Before Proceeding with Troubleshooting ····································································· 6-3
6.3 If an Alarm Code Appears on the LED Monitor ····························································· 6-4
6.3.1 Alarm code list ······························································································· 6-4
6.3.2 Causes, checks and measures of alarms ···························································· 6-8
[ 1 ] Ca1 to Ca5 User-defined alarm ······································································· 6-8
[ 2 ] Cof Current input terminals [C1], [C2] signal line break ········································· 6-8
[ 3 ] dba Braking transistor broken ·········································································· 6-8
[ 4 ] dbH Braking resistor overheat ·········································································· 6-9
[ 5 ] ECf EN circuit failure ····················································································· 6-9
[ 6 ] ECl Customizable logic error ·········································································· 6-10
[ 7 ] ef Ground fault protection (FRN0032G2S-2G/FRN0018G2□-4G or above) ············· 6-10
[ 8 ] er1 Memory error ························································································ 6-10
[ 9 ] er2 Keypad communication error ···································································· 6-11
[ 10 ] er3 CPU error ···························································································· 6-11
[ 11 ] er4 Option communication error ····································································· 6-11
[ 12 ] er5 Option error ·························································································· 6-11
[ 13 ] er6 Operation error ······················································································ 6-12
[ 14 ] er7 Tuning error ·························································································· 6-13
[ 15 ] er8 RS-485 communication error (Communication port 1)/
erp RS-485 communication error (Communication port 2) ···································· 6-14
[ 16 ] erd Step-out detection/detection failure of magnetic pole position at startup ············· 6-15
[ 17 ] erC Magnetic pole position detection error ························································ 6-16
[ 18 ] ere Speed inconsistency / Excessive speed deviation ········································· 6-17
[ 19 ] erf Data saving error during undervoltage ························································ 6-18
[ 20 ] erH Hardware error ······················································································ 6-18
[ 21 ] ero Positioning control error ·········································································· 6-18
[ 22 ] err Simulated failure ···················································································· 6-19
[ 23 ] fUs Blown fuse ··························································································· 6-19
[ 24 ] fAL DC fan lock··························································································· 6-19
[ 25 ] lin Input phase loss ···················································································· 6-19
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