DRV-28 inverter
s Troubleshooting
-233-
Fault
code
Fault type
Possible cause
Corrective measures
Autotuning timeout
EEP
EEPROM fault
R/W error occurred to the
control parameters;
EEPROM is damaged
Press STOP/RST to reset;
Replace the main control board
PIDE
PID feedback offline
fault
PID feedback offline;
PID feedback source
disappears;
Check PID feedback signal
wires;
Check PID feedback source
bCE
Brake unit fault
Brake circuit fault or brake
tube is damaged;
The resistance of external
brake resistor is too small
Check the brake unit, replace
with new brake tubes;
Increase brake resistance
END
Running time is up
The actual running time of
the inverter is larger than the
set running time
Ask help from the supplier,
adjust the set running time
OL3
Electronic overload
fault
The inverter releases
overload pre-alarm based on
the set value
Check the load and overload
pre-alarm threshold
PCE
Keypad
communication fault
The keypad wire is poorly
contacted or disconnected;
The keypad wire is too long
and suffers strong
interference;
Circuit fault occurred to the
keypad or communication
part of the main board
Check the keypad wires to
confirm whether fault exists;
Check the surroundings to rule
out interference source;
Replace the hardware and ask
for maintenance service
UPE
Parameter upload
error
The keypad wire is poorly
contacted or disconnected;
The keypad wire is too long
and suffers strong
interference;
Circuit fault occurred to the
keypad or communication
part of the main board
Check the surroundings to rule
out interference source;
Replace the hardware and ask
for maintenance service;
Replace the hardware and ask
for maintenance service
DNE
Parameter download
error
The keypad wire is poorly
contacted or disconnected;
The keypad wire is too long
and suffers strong
interference;
Check the surroundings to rule
out interference source;
Replace the hardware and ask
for maintenance service;
Re-backup keypad data
