Sourcetronic ST600 - Page 263

Frequency Inverter ST600 Series High-Performance Multifunction VFD Troubleshooting
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Circuit fault occurred to the
keypad or communication part of
the main board
Replace the hardware and
ask for maintenance service
UPE
[27] 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
[28] Parameter download
error
The keypad wire is poorly
contacted or disconnected;
The keypad wire is too long and
suffers strong interference;
Data storage error occurred to
the keypad
Check the surroundings to
rule out interference source;
Replace the hardware and
ask for maintenance service;
Re-backup keypad data
ETH1
[32] To-ground short
circuit fault 1
VFD output is short connected to
the ground;
Current detection circuit is faulty;
Actual motor power setup
deviates sharply from the VFD
power
Check whether motor wiring is
proper;
Replace the hall component;
Replace the main control
board;
Reset the motor parameters
properly
ETH2
[33] To-ground short
circuit fault 1
VFD output is short connected to
ground;
Current detection circuit is faulty;
Actual motor power setup
deviates sharply from the VFD
power
Check whether motor wiring is
proper;
Replace the hall component;
Replace the main control
board;
Reset the motor parameters
properly
dEu
[34] Speed deviation fault
Load is too heavy, or stall
occurred
Check the load to ensure it is
proper, increase the detection
time;
Check whether control
parameters are set properly
STo
[35] Maladjustment fault
Control parameters of
synchronous motor is set
improperly;
The parameter gained from
autotuning is inaccurate;
The VFD is not connected to
motor
Check the load to ensure it is
proper,
Check whether load is proper;
Check whether control
parameters are set correctly;
Increase maladjustment
detection time
LL
[36] Electronic underload
fault
The VFD performs underload pre-
alarm based on the set value
Check the load and overload
pre-alarm threshold