Washtech TCW-7022 Installation & maintenance manual - page 27
Error Causes
Action to Be Taken
‧ Input voltage drop
‧ Measure the main circuit DC voltage, if the
voltage is lower allowance level, regulate the
input voltage.
‧ Input voltage rise
‧ Measure the main circuit DC voltage, if the
voltage is higher than allowance level, regulate
the input voltage.
‧ Overload
‧ Cooling fan fault. Ambient temperature rises.
‧ Clogged filter.
‧
Check for the fan, filter and the ambient
temperature.
‧ Machine error or overload
‧ Check the use of the machine.
‧ Set a higher protection level (Cn-32).
‧ Insufficient Accel./Decel. Time
‧ Overload
‧ Excessive load impact occurs while operating
‧ Increase Accel./Decel. Time.
‧ Check the load.
‧ Operation sequence error
‧ 3-wire/2-wire selection error
‧ Check the circuit of system
‧ Check the setting of system parameters Sn-25,
26, 27, and 28.
‧ External noise
‧ Excessive vibration or impact on 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.
‧ Comm. between digital operator and inverter has not been
established after system starts for 5 seconds.
‧ Communication is established after system starts, but
transmission fault occurs for 2 seconds.
‧ Re-plug the connector of the digital operators.
‧ Replace the control board.
‧ External B.B. signal is input.
‧ After external BB signal is removed, execute the
speed search of the inverter.
‧ Inverter KVA setting error.
‧
Set proper KVA value. Be aware of the
difference of 220V and 440V
‧ The value of Sn-25~Sn-28 is not in ascending order (Ex.
Sn-25= 05, Sn-28= 02, those are improper setting).
‧Set speed search command of 21 and 22 simultaneously.
‧ Set these values by order (the value of Sn-25
must be smaller than those of Sn-26, 27, 28)
‧ Command 21 and 22 can not be set on two
multi-function-input contacts simultaneously.
‧ The values of Cn-02~Cn-08 do not satisfy
F
max
≥ F
A
≥ F
B
≥ F
min
.
‧ Change the settings.
‧ Upper limit and lower limit setting is incorrect.
‧ Change the settings.
‧
Improper ASR parameter setting or over-torque
protection level.
‧
Check the ASR parameter and over-torque
protection level.
‧
The circuit of PG is not properly connected or
open-circuit.
‧ Check the wiring of PG.
‧
Improper ASR parameter setting or over-torque
protection level.
‧
Check the ASR parameter and over-torque
protection level.
‧ Bad communication during operator and inverter.
‧The connector is not properly connected.
‧ Check if the connector is not properly connected.
‧ Operator EEPROM error.
‧ Disable load function of operator.
‧ Replace the operator.
‧ Incorrect inverter data format
‧ Communication noise.
‧ Download the data to the operator again.
‧ Check if the connector is not properly connected.
‧ Communication noise
‧ Check if the connector is not properly connected.
‧ Inverter capacity and motor rating are not properly matched.
‧ The wiring between inverter and motor is disconnected.
‧ Motor load unbalance.
‧ Correct the inverter/motor capacity ratio, wiring
cable and motor load.
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