INVT Goodrive20-EU VFD Series Operation Manual page 112

Goodrive20-EU series VFD
Fault
Fault type
code
OL2 VFD overload
Electrical
OL3
overload
Input phase
SPI
loss
Output phase
SPO
loss
Rectify
OH1
overheat
OH2 IGBT overheat
EF External fault
Communication
CE
error
Possible cause
1. Acceleration is too fast
2. Restart the rotating motor
3. Grid voltage is too low.
4. The load is too heavy.
5. The rated power is much
larger than the power actually
needed
The VFD will report overload
pre-alarm according to the set
value.
Phase loss or fluctuation of
input R, S, T
U, V, W phase loss output (or
serious asymmetrical three
phase of the load)
Air duct is blocked or fan is
damaged;
Ambient temperature is too
high;
The time of overload running is
too long;
SI external fault input terminals
acts
The baud rate setting is
incorrect;
Fault occurs to the
communication circuit;
The communication address is
wrong;
There is strong interference to
the communication
1. Increase acceleration time
2. Avoid restarting after
stopping.
3. Check the grid voltage
4. Select an VFD with larger
power.
5. Select a proper motor.
Check the load and the
overload pre-alarm point.
1. Check input power
2. Check installation wiring
1. Check the output wiring
2. Check the motor and cable
Refer to the overcurrent
solution;
Redistribute;
dredge the wind channel or
change the fan;
Lower down the ambient
temperature;
Check and reconnect;
Change the power;
Change the power unit;
Change the main control panel
Check the external device input
Set proper baud rate;
Check the wiring of
communication connection
interface;
Set proper communication
address;
Chang or replace the wiring or
improve the anti-interference
capability
108
Fault tracking
Solutions