TECO F510 series - Troubleshooting and Fault Diagnostics

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Chapter 4
Troubleshooting and
Fault Diagnostics
4.1 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.
4.2 Fault Detection Function
When a fault occurs, please refer to Table
4.1 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 4.1 Fault information and possible
solutions
LED display Possible solutions
OC
over current
 Extend acceleration time.
 Check the motor wiring.
 Disconnect motor and try
running inverter.
OCA
over current
 Set the longer acceleration
time
 Change to bigger capacity of
inverter
 Examine motor
 Check the wire
 Replace IGBT module
OCC
over current
 Change to bigger capacity of
inverter
LED display Possible solutions
 Add reactor to power source
OCD
over current
 Set the longer acceleration
time
GF
Ground fault
 Replace motor.
 Check the motor wiring.
 Disconnect motor and try
running inverter.
 Check resistance between
cables and ground.
 Reduce carrier frequency.
OV
Over voltage
 Increase deceleration time
 Reduce input voltage to
comply with the input voltage
requirements or install an AC
line reactor to lower the input
voltage.
 Remove the power factor
correction capacitor.
 Use dynamic braking unit.
 Replace braking transistor or
resistor.
 Adjust speed search
parameters.
UV
Under voltage
 Check the input voltage.
 Check input wiring.
 Check power source
 Replace pre-charge
contactor
 Replace control board or
complete inverter.
IPL
input phase loss
 Check if the main wiring
connection is correct.

Check if the terminal screw
gets loose.

Make sure having stable
input voltage or turn off IPL
detection function.

Replace the circuit board or
inverter
OPL
output phase
loss
 Check output wiring / faster
screws.
 Check motor & inverter
rating.
OH1
Heatsink
overheat
 Install fan or AC to cool
surroundings.
 Replace cooling fan.
 Reduce carrier frequency.
 Reduce load / Measure
output current
OH4
Motor
overheating
 Check the surrounding
temperature of motor.
 Check MT and GND
terminal wiring be correct.
OL1
Motor overload
 Check V/f curve.
 Check motor rated current