TECO F510 series - Warning; Self-Diagnosis Detection Function

10-7
10.3 Warning / Self-diagnosis Detection Function
When the inverter detects a warning, the keypad displays a warning code (flash).
Note: The fault contact output does not energize on a warning and the inverter continues operation.
When the warning is no longer active the keypad will return to its original state.
When the inverter detected a programming error (for example two parameters contradict each other of
are set to an invalid setting), the keypad displays a self-diagnostics code.
Note: The fault contact output does not energize on a self-diagnostics error. While a self-diagnostics
code is active the inverter does not accept a run command until the programming error is
corrected.
Note: When a warning or self- diagnostic error is active the warning or error code will flash on the
keypad.
Refer to Table 10.3.1 for and overview, cause and corrective action for inverter warnings and
self-diagnostic errors.
Table 10.3.1 Warning / self-diagnosis and corrective actions
LED display Description Cause Possible solutions
OV
(flash)
Over voltage
DC bus voltage exceeds the
OV detection level:
410Vdc: 200V class
820Vdc: 400V class
(for 440V class, if input
voltage 01-14 is set lower
than 400V, the OV detection
value will is decreased to
700Vdc)
 Deceleration time set too
short, resulting in
regenerative energy flowing
back from motor to the
inverter.
 The inverter input voltage is
too high.
 Use of power factor
correction capacitors.
 Excessive braking load.
 Braking transistor or resistor
defective.
 Speed search parameters
set incorrectly.
 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.
UV
(flash)
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: 200V class;
380Vdc: 400V class
(the detection value can be
adjusted by 07-13)
 The input voltage is too low.
 Input phase loss.
 Input voltage fluctuation.
 Magnetic contactor
damaged.
 DC bus voltage feedback
signal value not incorrect.
 Check the input voltage.
 Check input wiring.
 Check power source
 Replace magnetic
contactor
 Replace control board or
complete inverter.
OH1
Heat sink
overheatin
g
Heat sink is overheating :
The temperature of the heat
sink is too high.
If heat sink overheating fault
has occurred with three times
in five minutes, it is required
to wait for 10 minutes before
resetting the fault.
 Ambient temperature is too
high.
 The cooling fan has
stopped.
 Carrier frequency setting is
too high.
 Check the ambient
temperature of the
inverter.
 Check the fan or dust and
dirt in the heat sink.
 Check the carrier
frequency setting.