TECO E710-403-H3SF - Page 66

65
LED display Possible solutions
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.
• 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
LED display Possible solutions
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.
PGO
PG
Open circuit
• Check PG wiring.
• Check PG power-supply.
• Make sure brake is
released.
DEV
Speed
deviation
• Check load
• Make sure brake is
released.
• Check PG wiring.
• Check PG parameters
20-23/20-24.
• Increase Acceleration /
deceleration time.
CE
communication
error
• Check connection
• Check host computer /
software.
FB
PID feedback
loss
• Check feedback wiring
• Replace feedback
sensor.
STO
Safety switch
• Check F1 and F2
connection. (For standard
H & C type)