INVT Goodrive350 Series Operation Manual page 287

Goodrive350 IP55 High-ingress Protection Series VFD
Fault
Fault type
code
[21] EEPROM
EEP
operation fault
[22] PID feedback
PIDE
offline fault
[23] Braking unit
bCE
[24] Running time
END
reached
[25] Electronic
OL3
overload fault
[26] Keypad
PCE communication
[27] Parameter
UPE
upload error
[28] Parameter
DNE
download error
Possible cause
The parameters gained from
autotuning deviate sharply from
the standard parameters.
Autotuning timeout.
Control parameter
reading/writing error.
EEPROM damaged.
PID feedback offline.
PID feedback source
disappears.
Fault occurred to the braking
circuit or the braking pipe is
damaged.
fault
Resistance of the external
braking resistor is small.
The actual running time of the
VFD is longer than the internal
set running time.
The VFD reports overload
pre-alarm according to the
setting.
Keypad cable connected
improperly or disconnected.
Keypad cable too long, causing
strong interference.
fault
Keypad or mainboard
communication circuit error.
Keypad cable connected
improperly or disconnected.
Keypad cable too long, causing
strong interference.
Keypad or mainboard
communication circuit error.
Keypad cable connected
improperly or disconnected.
Keypad cable too long, causing
parameter settings.
Check whether the upper limit
frequency is larger than 2/3 of the
rated frequency.
Press STOP/RST to reset.
Replace the main control board.
Check PID feedback signal wires.
Check PID feedback source.
Check the braking unit, and
replace with new braking pipe;
Increase the brake resistance.
Ask for the supplier and adjust the
set running time.
Check the load and overload
pre-alarm threshold.
Check the keypad cable and
re-plug to determine whether a
fault occurs.
Check for and remove the
external interference source.
Replace the hardware and seek
maintenance services.
Check the keypad cable and
re-plug to determine whether a
fault occurs.
Check for and remove the
external interference source.
Replace the hardware and seek
maintenance services.
Check for and remove the
external interference source.
Replace the hardware and seek
-269-
Troubleshooting
Solution