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9 Fault alarm and Treatment
9.1Fault Diagnosis and Treatment
When a fault or alarm occurs, the servo drive will display ―
A
L
‖
Last fault can be viewed by P0-18. Fault display and treatment measures are as follows:
A
L
001
：
Short circuit
A
L
002
：
Hardware over current
A
L
003
：
Software over current
Fault Causes
Check
Solution
Short circuit of drive
output
1
：
Check the connection status between
motor and drive or if there is a short circuit
2
：
Check if the motor damaged
1
：
Exclude short circuit condition and
avoid metal conductor being exposed
externally.
2
：
Replace the damaged motor
Wiring error of the
motor
Check the wiring order of motor connected
to the drive
Re-wiring based on the wiring order
specification
Setting error of
control parameter
Check if the set value is much greater than
the factory setting value
Resume defaulted setting, and then
gradually modify
Command changes
drastically
Check if the control input command
changes too drastically
Fixed the change ratio of the input
command or initialize filter function
External braking
resistor is too small
or short circuit
Check if the external braking resistor
meets the specification
Use the braking resistor matched the
specification and set the parameters of
P8-18 and P8-20 correctly
Drive hardware fault
When all the above problems are excluded,
the fault still occurs
Send back to the dealer or the factory for
check
AL003
：
AD Initialization Fault
Fault Causes
Check
Solution
Fault of drive hardware Power to restart
，
if the fault still occurs
Send back to the dealer or the factory for
check
AL004
：
Memory Error
Fault Causes
Check
Solution
Abnormal
write
of
parameter data
Power off and restart
，
if the fault still
exists
Replace the drive
Memory
stored
too
frequently
Check the program of upper computer if
the drive‘s EEPROM is frequently
written.
Modify the program of upper computer,
changed to RAM address in case it should
be frequently written.
AL006
：
AD Sampling Fault
Fault Causes
Check
Solution
External analog
sampling deviation is
too large or timeout in
conversion
Power off and restart
，
if the fault still exists
Send back to the dealer or the factory
for check
AL007
：
Encoder Error 1
Fault Causes
Check
Solution
Encoder is loose
Check CN5 on the drive and the connector of
encoder
Re-install
Encoder wiring error
Check if the encoder wiring follows the
recommended specification as mentioned in
the manual
Wiring correctly
Encoder connection not
good
Check if CN5 on drive is well connected to
servo motor encoder, and if the shielding
layer is intact
Re-wiring
Encoder damaged
Exclude wiring problems, the fault still exists Replace the motor
AL008
：
Encoder Error 2
Fault Causes
Check
Solution
Z signal error of incremental Same with
AL007
Same with
AL007
