Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Parameter Useful functions
FR-D700 SC EC 6 - 271
6.20.2 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 in-
rush current 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 pre-
vent 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 6-274 is not performed.
The above parameters can be set when Pr. 160 = 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, cool-
ing fan, and each parts of the inrush
current limit circuit has reached the
life alarm output level or not.
Reading only
190/192/
197
Output terminal
function selection 6.9.5
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 dis-
played.
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, fre-
quent starts and stops of the magnetic contactor must be avoided.