Siemens SINAMICS V50, Operating Instructions Manual

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Fault information and trouble shooting
71
SINAMICS V50 converter
Operating Instructions, 04/2022, FW V1.0, A5E44777205B AB
Trip
code
Trip Type Possible causes Solutions
GF Ground Fault
1. One output phase
got short circuit
problem.
1. Check whether the
electric motor insulation is
weakening.
2. Check whether the wiring
between the frequency
converter and the electric
motor is damaged.
SC Load short-circuit
1. Wiring of drive and
motor get phase-to-
phase short circuit
2.Damage of the
inverting module IGBT
1. Check whether the
electric motor coil is short
circuit.
2. Ask for the services from
manufactures.
OH1
Heat-sink over
heat
1. Ambient
temperature too high
2. Fan is damaged
3. Fan air duct is
blocked
1. Lower the ambient
temperature.
2. Change the fan
3. Clear the air duct.
OL1 Motor overload
1. Power supply
abnormal
2. Motor rated current
set wrongly
3. The Curve of V/F is
not fit
4. Motor always works
with heavy load at low
speed.
5. Motor blocked to
stall or sudden large
load change
6.Motor power too low
1. Check the input power
source.
2. Check whether the
motor’s rated current is
correctly set up.
3. Adjust the V/F curve and
torque boosting
performance.
4. Use specialized electric
motor.
5. Check whether the motor
or the load is blocked to stall
or not.
6. Use motor and drive of
suitable power ratings
OL2 Drive overload
1. Low voltage in
power grid
2. Load too heavy
3. Acceleration too fast
4. Restart the motor
still in turning
1. Check the input power
source.
2. Select bigger capacity
drive.
3. Increase the acceleration
time
4. Avoid restarting when the
motor is in rotation.