E-25 Motors switch
over fault
during running
Change the selection of the
motor via terminal during
running of Inverter
Perform motor switchover after
inverter stops.
E-26 Wave limiting
current
Load heavy or motor blocked Reduce load or check mechanical
status
Inverter power small Select big rating inverter
E-27 Motor over
heat fault
Temperature sensor wiring
loose
Check sensor wiring
Motor temperature high Reduce carrier frequency or adopt
other heat radiation measure.
E-28 large speed
deviation
The encoder parameters are
set incorrectly.
Set the encoder parameters
properly.
Auto-tuning is not performed. Perform the motor autotuning.
PA65、PA66 setting is inproper Set PA65 and PA66 correctly based
on the actual situation.
E-29 Motor over
speed fault
Encorder parameter setting
incorrect
Set the encorder parameter properly
Auto-tuning is not performed Perform motor autotuning
Motor speed inspection
parameter PA63 and PA64
setting is incorrect
Set inspection parameter as actual
E-30 Load drop Inverter running current is
lower than PA60
Check the load disconnected or the
setting of PA60 and PA61
E-31 PID feedback
loss
PID feedback value less than
P6.26 setting value
Check PID feedback signal or set
P6.26 properly
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