ACS 400 User’s Manual 39
Note! These faults (**) are indicated by a red blinking LED and are reset by turning the power off for
a while.
16 ** DC BUS RIPPLE • Ripple voltages on the DC bus are too large.
• Input power supply phase may be missing
• Fuse may be blown
17
UNDERLOAD Motor load is too low. Check for a problem in the driven equipment.
Refer to parameters 3013 – 3015.
18 Reserved
19
DDCS LINK Problem with DDCS link.
• Check the DDCS option module and the optic fibres.
• Check the status of the fieldbus adapter. Refer to appropriate
fieldbus adapter manual.
• Check connections between external control system and fieldbus
adapter.
• Alternatively, check the status of the IO extension modules (NDIO),
required by PFC block.
Refer also to “DDCS Option Module Manual” and parameters 5004 –
5007.
20 *
AI OUT OF RANGE Analog input out of range. Check AI level.
21 - 26 **
HARDWARE ERROR Hardware error. Contact factory.
Full display blinking (ACS100-PAN)
“COMM LOSS” (ACS-PAN)
Serial link failure. Bad connection between the control panel and the
ACS 400.
http://nicontrols.com
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