Possible reasons for fault
Prohibiting contrarotation Auto-tuing during rollback
Cancel prohibiting rollback
Check the set value of
A0.10(upper limiting
frequency), make sure if it is
lower than the rated
frequency or not
With PG vector control, the signal of encoder is lost
Check the wiring of the
encoder, and re-wiring
The load of
drive is lost
The load is lost or reduced
Check the situation of the
load
Note：
The short circuit of the brake resistance can lead to the damage of brake unit fault.
Table 7-2 Abnormal phenomena and handling methods
Possible reasons of fault
No response
of operation
panel
Part of the keys or
all the keys are
disabled
In stopping status, first press ENTER and
hold on, then press ∨ 3 times
continuously to unlock the panel
Power-on the drive after it shuts down
completely
Panel’s cables are not well
connected.
Panel’s keys are damaged.
Replace operation panel or seek service
Settings of
parameters
cannot be
changed
Operating status
cannot be changed
Parameters are not allowed
changing during
operation
Change the parameters at STOP status
Part of parameters
cannot be
changed.
Parameters are actually detected,
not allowed changing
Do not try to change these parameters,
users are not allowed to chaged these
See ―No response of operation panel‖
Parameter not
displayed when
pressing MENU.
User’s password is required
Input correct user’s password
Instead, ―0.0.0.0.‖
is displayed
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