Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 472 / 608

Useful functions Parameter
6 - 318
6.21.2 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 cur-
rent limit circuit and 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 shown on page 6-321 is not performed.
The above parameters can be set when Pr. 160 "User group read selection" = 0.
Pr. No. Name Initial Value
Setting
Range
Description Parameters referred to
Refer to
Section
255
Life alarm status display 0 (0–15)
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 190–192 Output terminal
function selection
6.10.5
256
Inrush current limit circuit
life display
100% (0–100%)
Display the deterioration degree of the inrush
current limit circuit. Reading only
257
Control circuit capacitor life
display
100% (0–100%)
Display the deterioration degree of the control
circuit capacitor. Reading only
258
Main circuit capacitor life
display
100% (0–100%)
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 (refer to the following pages).
When the Pr. 259 value is "3" after powering on
again, the measuring is completed. Read the
deterioration degree in Pr. 258.
NOTE
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.