YASKAWA VS MINI J7 Manuel d'instructions télécharger pdf (Page 105)

104

 Troubleshooting

Trouble Cause Corrective Actions

The motor does not

operate when an

external operation

signal is input.

The operation method selection

is wrong.

The run command (n02) is not set to

Control Circuit Terminal.

Set the run command (n02) to

Control Circuit Terminal.

A 3-wire sequence is in effect.

The multi-function input method (n37)

is set to 3-wire sequence, and the S2

control terminal is not closed.

To use a 3-wire sequence, make the

wiring so that the S2 control terminal

is closed. To use a 2-wire sequence,

set the multi-function input (n37) to a

value other than 3-wire sequence.

The frequency reference is too

low.

The input frequency reference is

lower than the setting for the

min.output frequency (n14).

Input a frequency reference greater

than the min. output frequency (n14).

Local mode is in effect.

Set the LO/RE selection of the digital

operator to RE.

The SW setting for the refer-

ence selection is wrong.

Example: The reference 4-20 mA is

input, but the SW is set to “V.”

For analog input, make sure that the

frequency reference (n03) and SW8

settings are correct.

The setting of NPN/PNP switch

(SW7) is not correct.

Set SW7 correctly.

The motor stops. The

torque is not output.

The stall prevention level dur-

ing acceleration is too low.

Because the stall prevention level

during acceleration (n56) is set too

low, the output current reaches the

set level, the output frequency is

stopped, and the acceleration time is

lengthened.

Check if the stall prevention level

during acceleration (n56) is set to an

appropriate value.

The stall prevention level dur-

ing running is too low.

Because the stall prevention level

during running (n57) is set too low, the

output current reaches the set level,

and the speed drops.

Check if the stall prevention level

during running (n57) is set to an

appropriate value.

The load is too heavy.

If the load is too heavy, stall

prevention is activated, the output

frequency is stopped, and the

acceleration time is lengthened.

• Lengthen the set acceleration time

(n16).

• Reduce the load.

When the maximum frequency

was changed, the maximum

voltage frequency was also

changed.

To increase the speed of a general-

purpose motor, only change the

maximum frequency.

The V/f set value is too low.

Set the V/f (n09 to n15) according to

the load characteristics.

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