45
The warning and self-diagnosis functions do not operate fault contact output (except OH1 warning function)
and returns to the former operation status automatically when the factor is removed.
The fault display and troubleshooting are proudided as shown in the table below.
Fault Contact
output
Error causes Action to be taken
Operation
Inverter capacity is too small.
Voltage drop due to wiring.
Inverter power voltage selection is wrong
A motor of large capacity (11 kW or greater) connected to the
same power system has been started.
Rapid acceleration with generator power supply
Operation sequence when power is off
Defective electromagnetic contactor
Check the power capacity and power system.
UV display appears when the inverter power is turned off
while operation signal is input. Remove the power after
stopping the inverter.
(Set the third and fourth bits of Sn-04 to 01.)
Operation
Extremely rapid accel/decel
Motor on/off switching at the inverter output side
Short-circuit or ground-fault at the inverter output side
Motor of a capacity greater than the inverter rating has been
started
High-speed motor or pulse motor has been started.
Transistor error may occur. Investigate the error cause,
correct it, then restart.
Operation
Motor dielectric strength is insufficient.
Load wiring is not proper.
Check for ground-fault in motor or load wiring.
Operation
Over voltage
Insufficient deceleration time
Regenerative load (Motor is turned by the load.)
High input voltage compared to motor rated voltage
If braking torque is not proper, extend the decel time or use
a braking resistor. (If braking resistor is already installed,
verify that Sn-10. 2nd digit to 1.)
Operation
Defective cooling fan.
Ambient temperature rise
Clogged filter
Replace the cooling fan and clean the filter.
Ambient temperature:
104℉ (40℃) or less for enclosed type
122℉ (45℃) or less for open chassis
Operation
Overload, low speed operation or extended acceleration time,
improper V/f characteristic setting
Investigate the cause of overload and review the operation
pattern, V/f characteristic, and motor/inverter capacities. (If
inverter is repeatedly reset after an overload occurs, the
inverter may fault. Investigate and correct the cause of
overload.)
Operation
Motor current exceeds the preset value because of machine error
or overload.
Check the use of the machine. Correct the overload cause or
set a higher detection level which is within the allowable
range.
Operation External fault condition occurred. Correct the Cause of the fault input.
Operation
External noise
Excess vibration or shock
CPF 02: Control circuit fault
CPF 03: NVRAM (SRAM) fault
CPF 04: NVRAM BCC Code error
CPF 05: AD converter fault in CPU
Check data in Sn-01 and Sn-02. Record all data, then use,
Sn-03 for initializing.
Turn off power, then turn on again. If error is persistent,
contact your TECO representative.
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