Toshiba VF-SX - Manual (Page 155)

16-4 TOSHIBA
TABLE 16-1: (Continued)
1
Display Explanation and Possible Remedy
L OVERLOAD WARNING ISee Note 11
1. The load may be too large for the drive.
2. Increase the inverter rating.
3. ft Hf*l may be set too low.
H I
L O
SET VALUE ERROR WARNING ISee Note 11
1. There is a set value error during data read out and/or write
in. The value entered exceeds the allowed range of this
particular value. Check that there is no mistake in the
setting value, and reset. (Error display and data are
alternatively displayed twice.)
Note 1: These are warning displays only and do not necessarily cause the drive
to trip.
16.2 Other Errors and Remedies
other common error displays and potential remedies are shown in the table below.
TABLE 16-2: OTHER COHHON ERRORS AND REMEDIES
1 Error Symptoms Possible Cause and Remedy
The motor rotates but
the speed does not
change. 1. The load is too heavy. Decrease the
load or increase the rating of the
drive.
2. The soft-stall function is activated.
Turn the soft-stall function OFF.
3. The upper limit frequency
[ U L ]
set
value is too low. Increase the upper
limit frequency value.
A. The frequency setting signal is too
low. Check the signal value and
circuit.
5. Check the setting characteristics of
the frequency setting signal.
The motor rotation is
backwards from desired
direction.
1. Reverse the wiring at output terminals
U, V, and W. (any two wires.)