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Fault information and trouble shooting
7.3
The general fault diagnosis and solutions
Following abnormal situations might happen in using of the drive. Try to make
simple analysis according to the instructions as below.
S.N
Abnormity
Keypad LED no
1
display
power on
Motor does not
run after drive
2
give
command
Motor
running
3
reversely
Motor
4
serious vibration
The
noise
5
motor
is
loud
SINAMICS V50 converter
75
Operating Instructions, 04/2022, FW V1.0, A5E44777205B AB
Possible causes
1. Drive power supply absent
2. The keypad or the
connecting cable between
after
keypad and control board is
damaged.
3. The drive is damaged in
the internal.
1. The motor is damaged or
block up
2. The anti-reverse function
is set and rotation direction
conflicts with this setting.
run
3. The frequency reference
signal is zero.
4. The wiring of motor has
phase loss
1. The motor wiring
sequence is not correct.
1.Mechanical resonance
gets
2.The legs of the machine
not stable
3.Output phases imbalance
1. Lubrication is not good or
of
bearing wear
too
2. Carrier frequency is too
low
Countermeasure
1. Check the input power
supply
2. Change connecting
cable between keypad
and control board or
change keypad.
3. Ask for service from
supplier
1. Replace the electric
motor or rule out the
mechanical failure.
2. Remove "Anti-reverse"
setting or change the
motor running direction.
3. Check frequency
reference signal.
4. Check the electric
motor wiring.
1. Alter the sequence of
the motor wiring
2. Adjust the function
code F0.18.
1. Adjust the machine
2. Adjust the machine
legs
3. Check the load.
1. Repair or replace the
electric motor.
2. Increase the carrier
frequency of the drive
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