Toshiba S9 Fault index
Problems and Solutions
The motor runs at a higher or lower speed than specified:
- Causes and Solutions:
+ The motor's voltage rating is incorrect. Use a motor with the correct voltage rating.
+ The motor terminal voltage is too low. Check the setting of the base frequency voltage parameter F305F305. (See 6.12.6.)
+ Replace the cable with a larger diameter cable.
+ The reduction gear ratio is not set correctly. Adjust the reduction gear ratio.
+ The output frequency is not set correctly. Check the output frequency range.
+ Adjust the base frequency. (See 5.11.)
The motor speed fluctuates during operation:
- Causes and Solutions:
+ The load is too heavy or too light. Reduce load fluctuations.
+ The inverter or motor used is not rated large enough to drive the load. Use an inverter or motor with a sufficient rating.
+ Check if the frequency setting signal changes.
+ If the V/F control selection parameter PLPL is set to 3, check the vector control settings, operating conditions, etc. (See 5.12.)
Parameter settings cannot be changed:
- Causes and Solutions:
+ Change the setting of the parameter F700F700 (prohibition of parameter change) to CC (permitted) if it is set to tt (prohibited).
+ For safety reasons, some parameters cannot be reprogrammed while the inverter is running.
Problems and Solutions
The motor runs in the wrong direction:
- Causes and Solutions:
+ Reverse the phases of the output terminals (U, V, and W).
+ Reverse the forward/reverse run signal terminals of the external input device. (See 6.3 for function assignment to control terminals.)
The motor runs but does not change speed normally:
- Causes and Solutions:
+ The load is too heavy. Reduce the load.
+ The soft stall function is activated. Disable the soft stall function. (See 5.14.)
+ The maximum frequency FHFH and upper limit frequency ULUL are set too low. Increase the maximum frequency FHFH and upper limit frequency ULUL.
+ The frequency setting signal is too low. Check the signal set value, circuit, cables, etc.
+ Check the setting characteristics (point 1 and point 2 settings) of the frequency setting signal parameters. (See 6.5.)
+ If the motor runs at a low speed, check if the stall prevention function is activated because the torque boost amount is too large. Adjust the torque boost amount UBUB and acceleration time ACCACC. (See 5.12 and 5.1.)
The motor does not accelerate or decelerate smoothly:
- Causes and Solutions:
+ The acceleration time ACCACC or deceleration time DECDEC is set too short. Increase the acceleration time ACCACC or deceleration time DECDEC.
Too much current flows into the motor:
- Causes and Solutions:
+ The load is too heavy. Reduce the load.
+ If the motor runs at a low speed, check whether the torque boost amount is too large. (See 5.13.)
When Overload Functions Are Active
- When any overload function (OL1: inverter overload, OL2: motor overload, OLr: braking resistor overload) is active, the inverter cannot be reset by inputting a reset signal from an external device or operation panel before the virtual cooling time has passed.
Virtual Cooling Time
- OL1: Approximately 30 seconds after a trip event
- OL2: Approximately 120 seconds after a trip event
- OLr: Approximately 20 seconds after a trip event
Trip Due to Overheating (OH)
- The inverter checks the temperature within. Wait until the temperature inside the inverter falls sufficiently before resetting.
Caution!!!
- Turning the inverter off and then on again resets the inverter immediately. You can use this mode if you need to reset the inverter immediately. However, frequently doing this may damage the system or motor.
Restoring from a Trip
Do not reset the inverter when tripped due to a failure or error before eliminating the cause. Resetting the tripped inverter without solving the problem may cause it to trip again.
The inverter can be restored from a trip by one of the following methods:
- By turning off the power (keep the inverter off until the LED turns off).
+ Note: See 6.15.3 (inverter trip retention selection F602) for details.
- By means of an external signal (short-circuiting control terminals RST and CC).
- By operation panel operation.
- By inputting a trip clear signal from a remote input device.
+ Refer to the remote input device operating manual for details.
Resetting the Inverter with the Operation Panel
- Press the STOP button and ensure "C L r" is displayed.
- Press the STOP button again if the trip cause has already been resolved.
Alarms Displayed During Operation
C - Overcurrent Alarm:
- Description:
+ Same as OC (overcurrent).
P - Overvoltage Alarm:
- Description:
+ Same as OP (overvoltage).
L - Overload Alarm:
- Description:
+ Same as OL1/OL2 (overload).
H - Overheat Alarm:
- Description:
+ Same as OH (overheat).
If Two or More Problems Arise Simultaneously
- In this case, one of the following alarms appears and blinks:
+ CP, PL, CPL
- Blinking alarms C, P, L, H are displayed in this order from left to right.
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