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8 Fault and maintenance SV800/SV800A User Manual
210
The wiring between inverter output terminal
and motor wrong
Ensure the wiring between the inverter and the motor is
correct
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
ot
ot
Over torque fault
20
Possible causes
Countermeasures
Load too heavy
Decrease the load
Improper selection of inverter or motor
Reduce the load or reselect the inverter and motor
Improper setting of motor over torque
protection parameters
Reset parameters in (
P0-04~P0-06
)
Improper setting of torque limit value
Adjust the torque limit (
d2-01, d2-02, d2-03, d2-04
)
Speed sensor parameter setting or wiring
improper
Modify speed sensor parameters (
b1-07, b2-07
) or adjust
wiring
Improper set motor nameplate parameters
Modify the motor nameplate parameters (
b1
,
b2
)
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
CPy
CPY
Parameter copy failure
21
Possible causes
Countermeasures
The version in the keyboard not match with
the main control board.
Keep same version for parameters download
Communication between the main control
board and the keyboard abnormal
Check if the communication is interrupted
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
FbL
FbL
PID feedback loss failure
22
Possible causes
Countermeasures
PID feedback voltage is less than the set
loss value
Reset proper loss detection value
Feedback signal is not connected
Check if the feedback signal is correctly connected.
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
rUn
rUn
Switching motor during operation
23
Possible causes
Countermeasures
Switching motor during operation
Prohibit switching motor during operation