INVT GD100 - Page 7

Fault
code
Fault type Possible cause Solution
SPI
Phase loss on the input
side
 Phase loss or violent fluctuation
occurred on input R, S, T.
 Check the input power.
 Check the installation wiring.
SPO
Phase loss on output
side
 Phase loss output occurs to U, V,
W (or the three phases of the
load are seriously asymmetrical)
 Check the output wiring.
 Check the motor and cable.
OH1
Rectifier module
overheating
 Air duct jam or fan damage
occurs.
 Ambient temperature is too high.
 The time of overload running is
too long.
 Dredge the vent duct or replace the
fan.
 Lower the ambient
temperature.
OH2 VFD module overheat
EF External fault
 SI external fault input terminals
action.
 Check the external device input.
CE
RS485
communication fault
 The baud rate setting is incorrect.
 A fault occurs to the
communication wiring.
 The communication address
is incorrect.
 Communication suffers from
strong interference.
 Set a proper baud rate.
 Check the communication interface
wiring.
 Set a proper communication
address.
 Replace or change the wiring to
enhance the anti-interference
capability.
ItE Current detection fault
 The control board connector is in
poor contact.
 Hall device is damaged.
 An exception occurs on the
magnifying circuit.
 Check the connector and re-plug.
 Replace the Hall device.
 Change the main control board.
tE Motor autotuning fault
 The motor capacity does not
match the VFD capacity.
 Motor parameters are not set
correctly.
 The difference between the
parameters obtained from
autotuning and the standard
parameters is great.
 Autotuning timed out.
 Change the VFD mode.
 Set the motor type and
nameplate parameters correctly.
 Empty the motor load.
 Check the motor wiring and
parameter settings.
 Check whether the upper limit
frequency is higher than 2/3 of the
rated frequency.
EEP
EEPROM operation
fault
 Error in reading or writing control
parameters.
 EEPROM is damaged.
 Press STOP/RST for reset.
 Change the main control board.
PIDE
PID feedback
disconnection
 PID feedback is disconnected.
 The PID feedback source
disappears.
 Check the PID feedback signal
wires.
 Check the PID feedback source.
END
Running time
reached
 The actual running time of the
VFD is longer than the internal
set running Time
 Ask the supplier to adjust the
preset running time.
OL3 Electronic overload
 The VFD reports overload pre-
alarm
 according to the setting.
 Check the load and overload
pre-alarm threshold.
ETH1
To-ground
short-circuit fault 1
 VFD output is short connected to
the ground.
 There is a fault in the current
detection circuit.
 Check whether the motor wiring is
proper.
 Replace the Hall device.
 Change the main control board.
ETH2
To-ground short-
circuit fault 2
tSF Hydraulic probe damage  Hydraulic probe damage.  Replace the hydraulic probe.