Chapter 5 Troubleshooting|
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Revision 2016/03, 6ELE, V1.14
5-3
5.4 Low Voltage (Lv)
Low vo ltage
Is input pow er cor rect? O r power cut,
including mo mentary pow er loss
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
Restart after r eset
Check if there i s any malfunction
component i n
pow er s upply c ircuit
or disconnection
Change defec tiv e component
and chec k connection
Check if voltage is
within speci fic ati on
Make nec essary cor rections,
such as change power supply
sy stem for requirement
Check if there i s heavy load
with high s tar t cur rent in the
same power sy stem
Check if Lv occurs when
breaker and magne tic
contactor is ON
Suitable
transformer
pow er
capacity
Check if voltage between +/B1
and - is greater than
200VDC (for 115V/230V models)
400VDC (for 460V models)
Maybe AC motor drive has m al function.
Please cont act DELTA.
Contr ol c ircuit has malfunction or
misoper ation due to noise. P leas e
contact DELTA.
Yes
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