TI120 Series Variable Frequency Drive
Fault Diagnosis and Countermeasures
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Fault code
Failure
Display
Fault name
Cause
Countermeasure
over-speed
over-speed value
Large load fluctuation
Stable load
30
Er.Enc
Encoder fault
Incorrect encoder connection
Change encoder wiring
Encoder has no signal output
Check encoder quality and power
supply
Encoder wiring disconnected
Repair disconnection
Abnormal function code setting
Confirm the relevant function code
settings of variable frequency drive
encoder
Correct
37
Er.SEF
Speed
estimation
fault
The motor is not recognized or
the parameters are incorrect.
Re-identification of motor
parameters
39
Er.Cpy
Parameter
copy fault
Parameter upload or download
exception
Seek technical support
Download directly without
parameter on operation
keyboard
Seek technical support
