TECO F510 series - Chapter 10 Troubleshooting and Fault Diagnostics; 10.1 General; 10.2 Fault Detection Function; Table 10.2.1 Fault information and possible solutions

10-1
Chapter 10 Troubleshooting and Fault Diagnostics
10.1 General
Inverter fault detection and early warning / self-diagnosis function. When the inverter detects a fault, a
fault message is displayed on the keypad. The fault contact output energizes and the motor will coast to
stop (The stop method can be selected for specific faults).
When the inverter detects a warning / self-diagnostics error, the digital operator will display a warning or
self-diagnostic code, the fault output does not energize in this case. Once the warning is removed, the
system will automatically return to its original state.
10.2 Fault Detection Function
When a fault occurs, please refer to Table 10.2.1 for possible causes and take appropriate measures.
Use one of the following methods to restart:
1. Set one of multi-function digital input terminals (03-00, 03-05) to 17 (Fault reset); activate input
2. Press the reset button on the keypad and clear fault message.
3. Power down inverter wait until keypad goes blank and power-up the inverter again.
When a fault occurs, the fault message is stored in the fault history (see group 12 parameters).
Table 10.2.1 Fault information and possible solutions
LED display Description Cause Possible solutions
OC
over current
The inverter output current
exceeds the overcurrent
level (around 200% of the
inverter rated current).
 Acceleration time is too short.
 Contactor at the inverter output side.
 A special motor or applicable
capacity is greater than the inverter
rated value.
 Short circuit or ground fault.
 Extend acceleration time.
 Check the motor wiring.
 Disconnect motor and try
running inverter.
OCA
over current
The inverter output current
exceeds the overcurrent
level in acceleration time
 Acceleration time is too short
 Capacity of motor is bigger than
inverter
 Short circuit between winding and
shell of motor
 Short circuit between wire and
ground of motor
 IGBT broken module
 Set the longer acceleration
time
 Change to bigger capacity of
inverter
 Examine motor
 Check the wire
 Replace IGBT module
OCC
over current
The inverter output current
exceeds the overcurrent
level in constant speed
 Instantaneous change of load
 Instantaneous change of current
 Change to bigger capacity of
inverter
 Add reactor to power source
OCD
over current
The inverter output current
exceeds the overcurrent
level in deceleration time
 Deceleration time is too short
 Set the longer acceleration
time
GF
Ground fault
The current to ground
exceeds 50% of the
inverter rated output
current (08-23 = 1, GF
function is enabled).
 Motor damaged (insulation).
 Wire damage or deterioration.
 Inverter DCCT sensors defect.
 Replace motor.
 Check the motor wiring.
 Disconnect motor and try
running inverter.
 Check resistance between
cables and ground.
 Reduce carrier frequency.