TECO A510s Series - Page 48

47
LED display Corrective action
OH2
(flash)
Inverter over
heating
warning
 Multi-function input
function set incorrectly.
 Check wiring
OT
(flash)
over torque
detection
 Check over torque
detection parameters
(08-15 / 08-16).
 Check and reduce
motor load, check and
operation duty cycle.
UT
(flash)
under torque
detection
 Check under torque
detection parameters
(08-19 / 08-20).
 Check load /
application.
bb1
(flash)
External
baseblock
 Multi-function input
function set incorrectly.
 Check wiring
bb2
(flash)
External
baseblock
bb3
(flash)
External
baseblock
bb4
(flash)
External
baseblock
bb5
(flash)
External
 Multi-function input
function set incorrectly.
LED display Corrective action
baseblock

Check wiring
bb6
(flash)
External
baseblock
bb7
(flash)
External
baseblock
bb8
(flash)
External
baseblock
OS
(flash)
Motor over
speed
 Check ASR parameters
group 21.
 Check PG parameters
 Check overspeed
parameters 20-20/20-
12.
PGO
(flash)
PG open
circuit
 Check PG wiring.
 Check PG power-
supply.
 Make sure brake is
released.
DEV
(flash)
Speed
deviation
 Check load
 Make sure brake is
released.
 Check PG wiring.
 Check PG parameters
20-23/20-24.
 Increase Acceleration /
deceleration time.
OL1
Motor overload

Check V/f curve.
 Check motor rated
current
 Check and reduce
motor load, check and
operation duty cycle.
OL2
Inverter
 Check V/f curve.