Toshiba VF-s15 fault codes
Restoring the Inverter After a Trip
Avoid resetting the inverter following a trip due to a fault or error before identifying and resolving the root cause. Resetting the inverter without addressing the underlying issue will likely cause another trip.
You can restore the inverter from a trip using any of the following methods:
+ By turning off the power: Keep the inverter powered down until the LED goes off.
+ Note: For more details, refer to the inverter trip hold selection parameter F602.
+ By using an external signal: Short-circuit between RES and CC (or P24) on the control terminal block (when open). Ensure the reset function is assigned to the input terminal block (function numbers 8 or 9).
+ Through the panel keypad operation.
+ By sending a trip clear signal via communication: (For more information, see the communication manual (E6581913)).
To reset the inverter using the panel keypad, follow these instructions:
+ Press the STOP button and ensure " Er " appears on the display.
+ Press the STOP button again to reset the inverter, provided the trip cause has already been cleared.
+ If any overload protection is active (OL1: inverter overload, OL2: motor overload, OL3: braking resistor overload), the inverter cannot be reset via an external signal or the panel keypad until the virtual cooling period has elapsed.
Virtual cooling times:
+ OL1: Approximately 30 seconds after the trip occurs
+ OL2: Approximately 120 seconds after the trip occurs
+ OL3: Approximately 20 seconds after the trip occurs
+ For OL4 (Main module overload), there is no cooling period required.
+ In cases of overheating trips (OH), the inverter will check the internal temperature. Wait until it sufficiently cools before attempting a reset.
+ The inverter cannot be reset while the emergency stop signal is active.
+ The inverter also cannot be reset if a pre-alarm is detected.
[Caution]
Turning the inverter off and then back on will immediately reset it. This method is suitable for urgent resets; however, frequent use may harm the system or motor.
If the Motor Does Not Run Without a Trip Message Displayed...
If the motor fails to run without a trip message being shown, follow these steps to identify the issue:
+ The motor does not run.
+ Is the Transgate LED off?
+ Yes:
+ Check the power supply and the MCCB.
+ Is power supplied correctly?
+ Ensure the power is supplied normally.
+ Contact your Toshiba distributor.
+ No:
+ Is "OFF" displayed?
+ Close the circuit between CC (or P24) and the terminal assigned to the ST (standard) function on the control terminal.
+ Open the contact between CC (or P24) and the terminal assigned to the FRS (coast) function on the control terminal block.
+ Check the busy-selective functions selection parameter (F611). (Refer to section 13.7.)
+ Is there a failure message displayed? (See section 13.1)
+ Identify and correct the cause of the fault, then reset the inverter. Refer to section 13.2 for reset instructions.
+ Are any operation or trip error messages displayed? (See section 13.1)
+ The inverter is currently retrying. You can disable the retry function by adjusting the retry settings.
+ Is the RUN/STOP key's LED lit?
+ If using panel operation, press the RUN key to start.
+ Confirm the operation panel frequency setting is correct.
+ If in external operation mode, modify the operation control mode parameter (F700). (Refer to section 13.7.)
+ Is the RUN/STOP key's LED off?
+ If using panel operation, change the operation selection parameter (F701) and verify the frequency command is set properly.
+ If in external operation mode, adjust the operation control mode parameter (F700). (Refer to section 12.1.)
+ Check if the RUN command is properly input.
+ Is "0.0" displayed?
+ Ensure the frequency setting signal is not zero.
+ Verify the frequency command parameter range (F700).
+ Check the operation panel frequency setting signals (points 1 and 2). (Refer to section 12.1.)
+ If in external operation mode, confirm the external frequency signal is correctly input.
+ If using the operation panel mode, verify the frequency signal settings.
+ Ensure the acceleration/deceleration time settings are correct.
+ Confirm the auxiliary frequency signal is set properly.
+ Check if the torque boost logic control setting is appropriate.
+ Reset if necessary.
Use the parameter display function and status monitoring function to determine the cause.
Refer to chapter 11 for the parameter display function or chapter 9 for status monitoring.
Identifying Other Problems and Their Solutions
The table below lists additional problems, their potential causes, and suggested solutions:
+ Motor runs in the wrong direction:
+ Swap the phases at the output terminals U/T1, V/T2, and W/T3.
+ Reverse the forward/reverse run signal terminals of the external input device.
+ Refer to section 12.1.
+ Adjust the parameter F settings (refer to section 13.7).
+ Motor runs, but speed does not change normally:
+ Load is too heavy; reduce the load.
+ Stall function is enabled; disable stall stop function (see section 5.6).
+ Maximum frequency (FH) and upper limit frequency (UL) are set too low; increase these settings.
+ Speed setting signal value is too low; check signal values, circuits, and cables.
+ Verify wiring between the potentiometer and panel 2 frequency settings (see section 6.10.2).
+ Load is too large; reduce the load.
+ Stall prevention function triggered by excessive acceleration (ACC) or deceleration (DEC) times; adjust torque boost (UB) and acceleration time (ACC).
+ Motor does not accelerate or decelerate smoothly:
+ Load is too heavy; reduce the load.
+ Increase acceleration time (ACC) or deceleration time (DEC).
+ Excessive current into the motor:
+ Motor rating is inadequate; use a motor with the appropriate voltage rating.
+ Refer to section 6.10.2.
+ Motor runs at incorrect speed:
+ Load is too heavy; reduce the load.
+ Adjust parameter F settings (refer to section 13.7).
+ Motor speed fluctuates during operation:
+ Load is too heavy; reduce the load.
+ Check and correct voltage input wiring as needed. Adjust the reduction gear ratio (refer to section 6.5).
+ Speed setting signal changes; check upper and lower limits.
+ Ensure motor and cables are correctly rated for load.
+ Parameter settings cannot be changed:
+ Adjust the parameter setting selection; refer to prohibited parameter F700 for active settings (see section 4.4).
+ Set parameter F300 (refer to section 3.3).
+ Parameter changes restricted while running:
+ Use the parameter settings mode to verify settings.
+ Turn off the power if terminals assigned input numbers 200-203 restrict changes during operation (refer to section 11.9).
Handling Parameter Setting Issues
+ Forgotten parameters after resetting to defaults:
+ Search for all parameters and adjust settings as needed. Refer to section 4.3 for details.
+ Restore all parameters to their default settings if needed. Refer to section 4.2 for instructions.