TECO E510s Series - Chapter 4 Software Index; 4.1 Keypad description

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LED display Possible solutions
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.
LV
Low 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
OH4
Motor overheat
 Check the surrounding
temperature of motor.
Check the MT and GND
 terminal wiring be correct
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
LED display Possible solutions
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.
CE
communication
error
 Check connection
 Check host computer /
software.
FB
PID feedback
loss
 Check feedback wiring
 Replace feedback sensor.
PO
Voltage Off
 Check SF1 and SG
connection
STO 1
Safety 1 Error
 Check SF1 and SG
connection.
PO2
Voltage Off
 Check SF2 and SG
connection
STO2
Safety 2 Error
 Check SF2 and SG
connection.
PO3
Voltage Off
 Replace the power board
 Contact with TECO
STO3
Safety 3 Error
 Replace the power board
 Contact with TECO.
EF0
External fault 0
 Reset Modbus
communication 0x2501 bit
2= "1"
EF1
External
Fault(S1)
 Multi-function input function
set incorrectly.
 Check wiring
EF2
External Fault
(S2)
EF3
External Fault
(S3)