TECHTOP TD20 Series - Page 93

TD20 Series VFD Fault Tracking
-91-
Fault code
Fault type
Possible cause
Solutions
serious asymmetrical three
phase of the load)
distribution
2. Check the motor and cable
OH1
Rectify overheat
1. Air duct jam or fan damage
2. Ambient temperature is too
high.
3. The time of overload
running is too long.
1. Refer to the overcurrent
solution
2. Redistribute
dredge the wind channel or
change the fan
3. Low the ambient
temperature
4. Check and reconnect
5. Change the power
6. Change the power unit
7. Change the main control
panel
OH2
IGBT overheat
EF
External fault
SI external fault input
terminals action
Check the external device
input
CE
Communication error
1. The baud rate setting is
incorrect.
2. Fault occurs to the
communication wiring.
3. The communication
address is wrong.
4. There is strong interference
to the communication.
1. Set proper baud rate
2. Check the communication
connection distribution
3. Set proper communication
address.
4. Chang or replace the
connection distribution or
improve the anti-interference
capability.
ItE
Current detection
fault
1. The connection of the
control board is not good
2. Assistant power is bad
3. Hoare components is
broken
4. The modifying circuit is
1. Check the connector and
repatch
2. Change the Hoare
3. Change the main control
panel