TECO A510s, Quick Setting Manual, Page: 52 / 111

51
LED display Possible solutions

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
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).
LED display Possible solutions

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)

Check SF1 / SF2 and SG
connection (For
enhanced E & G type)

Check if 08-30 =0 and
03-00~03-07=58
STO2
Safety switch
SS1
Digital input
Stop command

Check if 08-30 =0 and
03-00~03-07=58
EF0
External fault 0

Reset Modbus
communication 0x2501
bit 2= "1"
EF1
External fault
(S1)

Multi-function input
function set incorrectly.

Check wiring