TECO L510 - Page 137

10-2
LED display
Description
Cause
Possible solutions
LV
Under voltage
DC bus voltage is
lower than the UV
detection level or
the pre-charge
contactor is not
active while the
inverter is running.
190Vdc: 230V
class;
380Vdc: 460V
class;
The detection value
can be adjusted by
07-13).
 The input voltage is too low.
 Input phase loss.
 Acceleration time set too short.
 Input voltage fluctuation.
 Pre-charge contactor damaged.
 DC bus voltage feedback signal value not
incorrect.
 Check the input voltage.
 Check input wiring.
 Increase acceleration time.
 Check power source
 Replace pre-charge contactor
 Replace control board or
complete inverter.
OH
Heatsink
overheat
The temperature of
the heat sink is too
high.
Note: when OH
fault occurs three
times within five
minutes, it is
required to wait 10
minutes before
resetting the fault.
 Ambient temperature too high.
 cooling fan failed
 Carrier frequency set too high.
 Load too heavy.
 Install fan or AC to cool
surroundings.
 Replace cooling fan.
 Reduce carrier frequency.
 Reduce load / Measure output
current
OH
Heatsink
overheat
The temperature of
the heat sink is too
high.
Note: when OH
fault occurs three
times within five
minutes, it is
required to wait 10
minutes before
resetting the fault.
 Ambient temperature too high.
 cooling fan failed
 Carrier frequency set too high.
 Load too heavy.
 Install fan or AC to cool
surroundings.
 Replace cooling fan.
 Reduce carrier frequency.
 Reduce load / Measure output
current
CT Fault
Input voltage fault
 Abnormal input voltage, too much noise or
malfunctioning control board.
 Check input voltage signal and
the voltage on the control
board.
HPErr
Inverter capacity
setting error:
Inverter capacity
13-00 does not
match the rated
voltage
 The inverter capacity setting (13-00) does
not match the hardware voltage levels
 Check inverter capacity setting
(13-00) to meet the hardware
voltage levels.
Err4
CPU unusual
interrupt
 External noise interference
 Remove interference source
then restart drive by switching
power OFF/ON.
 If not resolved contact supplier.
OC-A
over current at
acceleration
The inverter output
current exceeds the
 Acceleration / Deceleration time is too short.
 Contactor at the inverter output side.
 A special motor or applicable capacity is
 Extend acceleration /
deceleration time.
 Check the motor wiring.