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8 Fault and maintenance SV800/SV800A User Manual
208
Motor burned or motor insulation aged
Check the motor insulation resistance abnormal or not
Output cable broken or aged and causes
short circuit
Check the cable between the inverter and the motor abnormal
or not.
The distributed capacitance between the
motor and the inverter too large
Reduce distributed capacitance
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
LF
LF
Output loss phase
11
Possible causes
Countermeasures
Inverter output loss phase
Make sure the output is connected correctly
Motor stator winding abnormal
Make sure the motor is normal or replace motor
Single phase motor connected
Single phase motor not supported
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
EPr
EPr
Parameter save failure
12
Possible causes
Countermeasures
Parameters save failure
Seek technical support from manufacturer
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
LU
LU
DC bus under-voltage
14
Possible causes
Countermeasures
Input power supply instantaneous power
failure
Make sure the input supply power is normal
Input power loss phase
Make sure the input supply power is normal
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
EF
EF
External terminal fault input
15
Possible causes
Countermeasures
Multi-function terminal with external
terminal fault input function is valid
Exclude the valid terminal signal
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
CUr
CUr
Current detection fault
16
Possible causes
Countermeasures