TECHTOP TD350 - Page 249

TD350 Series VFD Troubleshooting
-244-
Fault
code
Fault type
Possible cause
Corrective measures
fault
The temperature detection
resistance is abnormal;
Long-time overload running
or exception occurred
(terminal function 57);
Check whether temperature
sensor is proper;
Check the motor and perform
maintenance on the motor
STO
[40] Safe torque off
Safe torque off function is
enabled by external forces
/
STL1
[41] Exception
occurred to safe
circuit of channel H1
The wiring of STO is
improper;
Fault occurred to external
switch of STO;
Hardware fault occurred to
safety circuit of channel H1
Check whether terminal wiring
of STO is proper and firm
enough;
Check whether external switch
of STO can work properly;
Replace the control board
STL2
[42] Exception
occurred to channel
H2 safe circuit
The wiring of STO is
improper;
Fault occurred to external
switch of STO;
Hardware fault occurred to
safety circuit of channel H2
Check whether terminal wiring
of STO is proper and firm
enough;
Check whether external switch
of STO can work properly;
Replace the control board
STL3
[43] Exception
occurred to channel
H1 and channel H2
Hardware fault occurred to
STO circuit
Replace the control board
CrCE
[44] Safety code
FLASH CRC check
fault
Control board is faulty
Replace the control board
E-Err
[55] Repetitive
extension card type
The two inserted extension
cards are of the same type
Users should not insert two
cards with the same type;
check the type of extension
card, and remove one card
after power down
ENCUV
[56] Encoder UVW
loss fault
No electric level variation
occurred to UVW signal
Check the wiring of UVW;
Encoder is damaged
F1-Er
[60] Failed to identify
the extension card in
card slot 1
There is data transmission in
interfaces of card slot 1,
however, it cannot read the
card type
Confirm whether the extension
card inserted can be
supported;
Stabilize the extension card
interfaces after power down,
and confirm whether fault still
occurs at next power-on;
Check whether the insertion