TECO A510-2001-H - Warning; Self-Diagnosis Detection Function

5-5
5.3 Warning / self-diagnosis detection function
When the inverter detects a warning, the digital operator will display the warning code (flash), and the
fault output contact will not act. Once the warning is removed, the system will automatically restore the
original state.
When the inverter detects a self-diagnosis function (for example, there is an invalid setting or two
parameters are contradictive), the digital operator will display the self-diagnosis code, and the fault output
contact will not act. Before the parameter has been correctly set, the inverter can not execute the operation
command.
When a warning or a self-diagnostic error occurs, refer to Table 5.2 to confirm and correct the error.
When the RESET key is pressed at this time, the warning message (flash) disappears. If the warning or
self-diagnostic error still exists, the warnings will be displayed again in 5 seconds.
Table 5.2 warning / self-diagnosis and corrective actions
LED display Description Possible causes Corrective action
OV
( flash )
over voltage
Voltage of main circuit:
The DC bus voltage exceeds
the OV detection level, and
the inverter has stopped.
410Vdc: 230 V class
820Vdc: 460 V class
The input power voltage is too
high.
Check the input power
voltage
UV
( flash )
under voltage
Voltage of main circuit:
The DC bus voltage is lower
the UV detection level, and
the inverter has stopped.
190Vdc: 230V class
380Vdc: 460V class
(07-13 can set the detection
level)
. The input power voltage is
too low.
. Momentary power loss
occurs.
. Check the input power
voltage.
.Check the input circuit.
.Check the main circuit MC.
OH2
( flash )
Inverter over
heating
warning
Inverter over heating warning:
Use multi function digital input
terminals to input the inverter
over heating warning.
(03-00 ~03-07=31)
Multi function digital input
terminal receives the
occurrence signal of external
over heating warning.
Check the external condition
OT
( flash )
over torque
detection
over torque detection :
The inverter output current is
higher than 08-15 (OT
detection level ) and
exceeds set time of 08-16.
Subject to 08-14=1, the
inverter continues operation.
Mechanical load is too big.
.Check the application or the
machine’s operation
status.
.Check the set values of
08-15 and 08-16.
UT
( flash )
under torque
detection
Under torque detection :
The inverter output current is
lower than 08-19 (under
torque detection level ) and
exceeds set time of 08-20.
Subject to 08-18=1，the
inverter continues operation.
Mechanical load is removed
momentarily.（for example,
the belt is broken off）
.Check the application or the
machine’s operation status.
.Check the settings of 08-19
and 08-20.
bb1
( flash )
External block
External block ( Terminal
S1)
bb2
( flash )
External block
External block ( Terminal
S2)
bb3
( flash )
External block ( Terminal
S3)
External block input is
received by multifunction
digital input terminals.
.Remove the causes of
external block.