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Useful functions
4.26.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)
Degrees of deterioration of main circuit capacitor, control circuit capacitor, cooling fan and inrush current limit
circuit can be diagnosed by monitor.
When any part has approached the end of its life, an alarm can be output by self diagnosis to prevent a fault.
(Use the life check of this function as a guideline since the life except the main circuit capacitor is calculated
theoretically.)
For the life check of the main circuit capacitor, the alarm signal (Y90) will not be output if a measuring method of
(4) is not performed.
Parameter
Number
Name Initial Value Setting Range Description
255 Life alarm status display 0 (0 to 15)
Display whether the control circuit capacitor,
main circuit capacitor, cooling fan, and each
parts of the inrush current limit circuit has
reached the life alarm output level or not.
Reading only
256
Inrush current limit circuit
life display
100% (0 to 100%)
Display the deterioration degree of the inrush
current limit circuit. Reading only
257
Control circuit capacitor life
display
100% (0 to 100%)
Display the deterioration degree of the control
circuit capacitor. Reading only
258
Main circuit capacitor life
display
100% (0 to 100%)
Display the deterioration degree of the main
circuit capacitor. Reading only
The value measured by Pr. 259 is displayed.
259
Main circuit capacitor life
measuring
0
0, 1
(2, 3, 8, 9)
Setting "1" and switching the power supply OFF
starts the measurement of the main circuit
capacitor life.
When the Pr. 259 value is "3" after powering ON
again, the measuring is completed. Read the
deterioration degree in Pr. 258.
CAUTION
⋅ Since repeated inrush currents at power ON will shorten the life of the converter circuit, frequent starts and stops of the
magnetic contactor must be avoided.