TECO A510s Series - Page 51

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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 /
deceleration 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
 Add reactor to power
source
OCd
over current
 Set the longer acceleration
time
SC
short circuit
 Check the motor wiring.
 Disconnect motor and try
running inverter.
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.
LED display Possible solutions
UV
Under voltage

Check the input voltage.
 Check input wiring.
 Increase acceleration
time.
 Check power source
 Replace pre-charge
contactor
 Replace control board or
complete inverter.
IPL input phase
loss
 Check input wiring / faster
screws.
 Check power supply.
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
OL1
Motor overload

Check V/f curve.
 Check motor rated
current
 Check and reduce motor
load, check and operation
duty cycle.
OL2
Inverter overload

Check V/f curve.
 Replace inverter with
larger rating.
 Check and reduce motor
load, check and operation
duty cycle.
OT
Over torque
detection
 Check over torque
detection parameters (08-
15 / 08-16).
 Check and reduce motor
load, check and operation
duty cycle.
UT
Under torque
detection
 Check under torque
detection parameters (08-
19 / 08-20).
 Check load / application.
run
Switch for
Motor1/Motor2
 Revise the sequence
control and switch motor
in top time.
OS
Over speed
 Check ASR parameters
group 21.
 Check PG parameters
 Check overspeed
parameters 20-20/20-12.