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Fault information and trouble shooting
Trip
Trip Type
code
GF
Ground Fault
SC
Load short-circuit
Heat-sink
OH1
heat
OL1
Motor overload
OL2
Drive overload
SINAMICS V50 converter
71
Operating Instructions, 04/2022, FW V1.0, A5E44777205B AB
Possible causes
1. One output phase
got short circuit
problem.
1. Wiring of drive and
motor get phase-to-
phase short circuit
2.Damage of the
inverting module IGBT
1. Ambient
temperature too high
over
2. Fan is damaged
3. Fan air duct is
blocked
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. Low voltage in
power grid
2. Load too heavy
3. Acceleration too fast
4. Restart the motor
still in turning
Solutions
1. Check whether the
electric motor insulation is
weakening.
2. Check whether the wiring
between the frequency
converter and the electric
motor is damaged.
1. Check whether the
electric motor coil is short
circuit.
2. Ask for the services from
manufactures.
1. Lower the ambient
temperature.
2. Change the fan
3. Clear the air duct.
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
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.
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