TECHTOP TD20 Series - Page 92

TD20 Series VFD Fault Tracking
-90-
Fault code
Fault type
Possible cause
Solutions
running
components.
3. Install the braking
components.
4. Check the setting of relative
function codes.
UV
DC bus
Under-voltage
1. The voltage of the power
supply is too low.
2. The overvoltage stall
protection is not open.
1. Check the input power of
the supply line.
2. Check the setting of relative
function codes.
OL1
Motor overload
1. The voltage of the power
supply is too low.
2. The motor setting rated
current is incorrect.
3. The motor stall or load
transients is too strong.
1. Check the power of the
supply line
2. Reset the rated current of
the motor
3. Check the load and adjust
the torque lift
OL2
VFD overload
1. The acceleration is too fast
2. Reset the rotating motor
3. The voltage of the power
supply is too low.
4. The load is too heavy.
5. Close loop vector control,
reverse direction of the code
panel and long low-speed
operation
1. Increase the ACC time
2. Avoid the restarting after
stopping.
3. Check the power of the
supply line
4. Select an VFD with bigger
power.
5. Select a proper motor.
OL3
Electrical overload
The VFD will report overload
pre-alarm according to the set
value.
Check the load and the
overload pre-alarm point.
SPI
Input phase loss
Phase loss or fluctuation of
input R,S,T
1. Check input power
2. Check installation
distribution
SPO
Output phase loss
U,V,W phase loss input (or
1. Check the output