Siemens SINUMERIK 808D ADVANCED

Commissioning Manual
500 01/2017
Alarm
code
Background
Possible Cause
Remedy
A07 This alarm may occur
when the DC link is
connected
•
IGBT module is broken
• There is a short-circuit between U, V or W
and PE
•
Replace the drive with a new
one
• Check the wiring
This alarm may occur
when the motor is run-
ning
A08
• UVW signals of the encoder are bad
• Bad cable
• Bad cable shielding
• Bad wiring of the shielded ground cable
• There is a failure in the interface circuit of
the encoder
• Replace the drive with a new
one
• Check the interface circuit of
the encoder
A09
• Connection failure of encoder ABZ
• Bad cable
• Bad cable shielding
• Bad wiring of the shielded grounded cable
• There is a failure in the interface circuit of
the encoder
• Check the wiring of encoder
cable
• Check the interface circuit of
the encoder
A14
There is failure at the internal software
Reset by power-on
A short-circuit occurs to the encoder
Check the wiring of encoder
A21 This alarm may occur
when the 24 V DC sup-
ply is connected
There is a failure at the circuit board Replace the drive with a new one
This alarm may occur
when the DC link is
connected
• The mains supply voltage is too high
• The waveform of mains supply voltage is
abnormal
Check the power supply
This alarm may occur
when the motor is run-
ning
• Disconnection of the internal brake resistor
•
The internal brake resistor is broken
Replace the drive with a new one
Brake loop has no enough space
• Lower the start-stop frequency
• Minish the limit value of current
• Minish load inertia
• Use another drive and motor
with higher power
A22
The motor is mechanically blocked
Check the mechanical load
Overload
• Lighten the load
• Use another drive and motor
with bigger power
A23
• Circuit board fails
• Fuse of the power is burnt out
•
Rectifier is broken
Replace the drive with a new one
• Low supply voltage
• Insufficient supply power capacity
•
Transient power failure
Check the power supply
A24 This alarm may occur
when it's detected that
the difference between
the position setpoint
and the position actual
There is pulse inputs at the setpoint interface
X5 when the drive is in "S-2", "S-3", or "S-4"
state
When P38 = 1, check whether
more than 1000 pulses are re-
ceived at the setpoint interface X5
when the drive is in "S-2", "S-3", or
"S-4" state