TECHTOP TD20 Series Product Manual page 93

TD20 Series VFD
Fault code Fault type
OH1 Rectify overheat
OH2 IGBT overheat
EF External fault
CE Communication error
Current detection
ItE
serious asymmetrical three
phase of the load)
1. Air duct jam or fan damage
2. Ambient temperature is too
high.
3. The time of overload
running is too long.
SI external fault input
terminals action
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. The connection of the
control board is not good
2. Assistant power is bad
fault 3. Hoare components is
broken
4. The modifying circuit is
Possible cause
-91-
Fault Tracking
Solutions
distribution
2. Check the motor and cable
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
Check the external device
input
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.
1. Check the connector and
repatch
2. Change the Hoare
3. Change the main control
panel