GD350A series high-performance multifunction VFD
-255-
Fault
code
Fault type
Possible cause
Solution
Load is too large;
Power is too small;
Select the VFD with larger
power;
Select proper motor
SPI
Phase loss on
input side
Phase loss or violent fluctuation
occurred to R, S and T input
Check the input power;
Check installation wiring
SPO
Phase loss on
output side
Phase loss occurred to U, V, W
output (or the three phases of
motor is asymmetrical)
Check the output wiring;
Check the motor and cable
OH1
Overheat of
rectifier module
Air duct is blocked or fan is
damaged;
Ambient temperature is too high;
Long-time overload running
Ventilate the air duct or replace
the fan;
Lower the ambient temperature
OH2
Overheat of
VFD module
EF
External fault
SI external fault input terminal
acts
Check external device input
CE
Modbus/Modbus
TCP
communication
fault
Baud rate is set improperly;
Communication line fault;
Communication address error;
Communication suffers from
strong interference
Set proper baud rate;
Check the wiring of
communication interfaces;
Set proper communication
address;
Replace or change the wiring to
enhance anti-interference
capacity
ItE
Current
detection fault
Poor contact of the connector of
control board;
Hall component is damaged;
Exception occurred to
amplification circuit
Check the connector and re-
plug;
Replace the hall component;
Replace the main control board
tE
Motor
autotuning fault
Motor capacity does not match
with the VFD capacity, this fault
may occur easily if the difference
between them is exceeds five
power classes;
Motor parameter is set improperly;
The parameters gained from
autotuning deviate sharply from
the standard parameters;
Autotuning timeout
Change the VFD model, or
adopt V/F mode for control;
Set proper motor type and
nameplate parameters;
Empty the motor load and carry
out autotuning again;
Check motor wiring and
parameter setup;
Check whether upper limit
frequency is larger than 2/3 of
