KITO Harrington RY Series, Owner'S Manual

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7.3 VFD Error Reset and Restart
7.3.1 Error reset - When an error occurred, restart the VFD after removing the cause of the error. To restart
the VFD, turn on/off the emergency stop button. If the VFD is not reset, (1) Turn it on/off several times.
(2) If the VFD is too hot, cool it down before resetting.
7.3.2 Restarting the VFD after an error - If the VFD stopped due to an error, check the cause in the
following steps, and take measures so that the VFD can operate again.

Before turning on the power supply of the VFD, check the following:
There is no short circuit between the main circuit terminals R/L1, S/L2, and
T/L3
There is no short circuit from the main circuit terminals R/L1, S/L2, and T/L3 to
ground.
Failure to comply with the instructions may cause serious or even fatal injury, or VFD
damage.
1)
Turn on the power supply of the VFD.
2)
Check the details and cause of the error that has just occurred using the error trace parameter
U2-mm. U2-02 (past error) indicates which error caused the shutdown of the power supply. U2-
03 to U2-13 indicate the states of the VFD when the error occurred (frequency, current, voltage,
etc.). U3-01 to U3-10 indicate error history (for 10 errors). For information on how to check the
error trace, below.
3)
Remove the cause of the error. For measures against errors, refer to Details and Remedies
Tables 7-7, 7-8 and 7-9 .

If the error is still displayed when the power supply is turned on, remove the cause of
the error and perform an error reset operation.
7.3.3 If the VFD power supply was not shut down upon an error,
1)
Check the type of the error with the LED operator.
2)
Remove the cause of the error. For measures against errors, refer to Details and Remedies
Tables 7-7, 7-8 and 7-9 .
3)
Perform an error reset.