Washtech TCW-7055, Installation & Maintenance Manual

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Error Causes Action to Be Taken
‧
Power capacity is too small.
‧
Voltage drop due to wiring resistance.
‧
A motor of large capacity connected to the same power
system has been started.
‧
Defective electromagnetic contractor.
‧
Check the source voltage and wiring.
‧
Check the power capacity and power system.
‧
Extremely rapid accel.
‧
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 and pulse motor has been started.
‧
Extend the accel. time.
‧
Check the load wiring.
‧
Motor dielectric strength is insufficient.
‧
Load wiring is not proper.
‧
Check the motor wiring impedance and the load
wiring.
‧
Insufficient deceleration time.
‧
High input voltage compared to motor rated voltage.
‧
Extend the accel. time.
‧
Use a braking resistor.
‧
Defective cooling fan.
‧
Ambient temperature rise
‧
Clogged filter.
‧
Check for the fan, filter and the ambient
temperature.
‧
Overload, low speed operation or extended accel. time.
‧
Improper V-f characteristic setting
‧
Measure the temperature rise of the motor.
‧
Decrease the output load.
‧
Set proper V/f characteristic.
‧
Improper rated current (Cn-09) setting
‧
Set proper V/f characteristic.
‧
Set proper rated current (Cn-09)
‧
If inverter is reset repetitively before fault
removed, the inverter may be damaged.
‧
Machine errors or overload
‧
Check the use of the machine.
‧
Set a higher protection level (Cn-32).
‧
Fault input of external signal
e
,
g
,
h
,
i
and
j
.
‧
Identify the fault signal using Un-11.
‧
Disturbance of external noise
‧
Excessive impact or vibration
‧
Reset NVRAM by running Sn-03.
‧
Replace the control board if the fault can’t be
cleared.
‧
Improper setting of ASR parameter or over-speed
protection level.
‧
Check the parameters of ASR and the
protection level.
‧
The PG wiring is not properly connected or
open-circuit.
‧
Check the PG wiring.
‧
Improper setting of ASR parameter or speed
deviation level.
‧
Check parameters of ASR and speed deviation
level.
‧
External noise
‧
Excessive vibration or impact Communication wire
‧
Not properly contacted
‧
Check the parameter setting, including Sn-01, Sn-02.
‧
Check if the comm. wire is not properly contacted.
‧
Restart, if fault remains, please contact to us.
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