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8 Fault and maintenance SV800/SV800A User Manual
206
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
iGbt1
IGbt1
U phase module protection
3
Possible causes
Countermeasures
IGBT or IPM module damage
Check the IGBT or IPM modules
Output cable short circuit or short circuit to
ground
Check output cable
Motor damage
Check motor failure and replace motor
Inverter ambient temperature too high
Check installation environment and temperature rise inside
the inverter
Improper installation method of inverter
Install the inverter correctly
Unconnected DC reactor
Connect DC reactor
Carrier frequency too large
Decrease carrier frequency or reduce load
Continuous heavy load operation at low
frequency(<5.0Hz)
Select inverter with larger power and re-rate using
Power supply board or main control board
abnormal
Replace power board or main control board
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
iGbt2
iGbt2
V phase module protection
4
Possible causes
Countermeasures
Same as "
iGbt1
"
Same as "
iGbt1
"
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
iGbt3
IGbt3
W phase module protection
5
Possible causes
Countermeasures
Same as "
iGbt1
"
Same as "
iGbt1
"
LCD keyboard
display
LED keyboard
display
Fault Name
Communication
code
oL1
oL1
Inverter overload
6
Possible causes
Countermeasures
Load too heavy
Decrease the load
Improper selection of inverter or motor
Reduce the load or reselect the inverter and motor
The overload protection parameter inverter
not set properly
Reset the overload protection parameters (Authorized by
manufacturer)
Motor stall (V/F control)
Adjust the torque limit (
d4-06, d4-07
)
Improper setting of torque limit value
Adjust the torque limit (
d2-01, d2-02, d2-03, d2-04
)