161
Fault
code
Fault
descriptions
Possible reasons Actions
E-06
Over voltage in
constant-speed
operating
Abnormal of supply voltage Check the power supply
Special potential energy load
Connect suitable braking resistor or
braking unit
E-07
Bus
undervoltage
Abnormal of supply voltage
or disconnecting of contactor
(relay)
Check supply voltage or seek help
from manufacturer
E-08 Motor overload
Improper setting of V/F curve
or torque boost
Adjust V/F curve and torque boost
value
Low network voltage Check network voltage
Motor blocked or load
sudden change
Check load
Incorrect setting of motor
overload protection factor
Correct the setting
E-09 Driver overload
Improper setting of V/F curve
or torque boost
Adjust V/F curve and torque boost
value
Low network voltage Check network voltage
Too short Acc time Prolong Acc time
Too heavy load Select the driver with larger power
E-10 O load
Output current lower than
o-load detection
Check load
E-11
Function module
fault
Short circuit or grounded of
driver output
Check motor wiring
Instantaneous over current
of driver
Refer to actions of over current
Obstruction of damage of
ventilation channel
Clear the ventilation channel or
replace the fan
control board abnormal or
interference serious
Seek help from manufacturer
Power device damage Seek help from manufacturer
E-12 Input phase loss Phase loss of power supply C h e c k p o w e r s u p p l y a n d w i r i n g
E-13
Output phase
loss or current
imbalance
Output phase failure among
phase U, V, W
Check the driver's output wiring
6.1 Fault information and Troubleshooting
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