TEC TECDrive20-EU Series - Page 112

TECDrive20-EU Series Inverter Fault tracking
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6.2.3 Inverter faults and solutions
When a fault occurred, handle the fault as follows.
1. Check to ensure there is nothing wrong with the keypad. If no, please contact the local TEC
office.
2. If there is nothing wrong, please check P07 and ensure the corresponding recorded fault
parameters to confirm the real state when the current fault occurs by all parameters.
3. See the following table for detailed solution and check the corresponding abnormal state.
4. Eliminate the fault and ask for relative help.
5. Check to eliminate the fault and carry out fault reset to run the inverter.
Note: The numbers enclosed in square brackets such as [1], [2] and [3] in the Fault type
column in the following table indicate the inverter fault type codes read through
communication.
Fault
code
Fault type
Possible cause
Solutions
OUt1
[1] Inverter unit
U phase
protection
 Acceleration is too fast;
 IGBT module damaged;
 Misacts caused by
interference;
 The connection of the drive
wire is not good;
 To-ground short circuit.
 Increase acceleration time;
 Replace the power unit;
 Check drive wires;
 Check whether there is
strong interference caused
by external equipment.
OUt2
[2] Inverter unit
V phase
protection
OUt3
[3] Inverter unit W
phase protection
OC1
[4] Overcurrent
during
acceleration
 Acceleration is too fast;
 Grid voltage is too low;
 Inverter power is too small;
 Load transients or is
abnormal;
 To-ground short circuit or
output phase loss occur;
 There is strong external
interference;
 The overvoltage stall
protection is not open.
 Increase acceleration time;
 Check input power;
 Select the inverter with a
larger power;
 Check if the load is short
circuited (to-ground short
circuit or line-to-line short
circuit) or the rotation is not
smooth;
 Check the output wiring;
 Check if there is strong
interference;
 Check the setting of related
function codes.
OC2
[5] Overcurrent
during
deceleration
OC3
[6] Overcurrent
during constant
speed running
OV1
[7] Overvoltage
 The input voltage is
 Check the input power;