Mitsubishi Electric FR-A700 Instruction Manual page 708

Useful functions
Pr. 255
(decimal)
15
14
13
12
11
10
Tab. 6-179: Displaying the end of service life by bits
✔: End of the service life is reached
—: End of the service life is not reached
The life alarm signal (Y90) turns on when any of the control board capacitor, main circuit capac-
itor, cooling fan and inrush current limit circuit reaches the life alarm output level.
For the terminal used for the Y90 signal, set "90" (source logic) or "190" (sink logic) to any of
Pr. 190 to Pr.196 "Output terminal function selection".
NOTES The digital output option (FR-A7AY) allows the control circuit capacitor life signal (Y86),
main circuit capacitor life signal (Y87), cooling fan life signal (Y88) and inrush current limit
circuit life signal (Y89) to be output individually.
When terminal assignment is changed using Pr. 190 to Pr. 196 "Output terminal function
selection", the other functions may be affected. Please make setting after confirming the
function of each terminal.
Life display of the inrush current limit circuit (Pr. 256)
The life of the inrush current limit circuit (relay, contactor and inrush resistor) is displayed in
Pr. 259.
The number of contact (relay, contactor, thyristor) ON times is counted, and it is counted down
from 100% (1 million times) every 1%/10,000 times. As soon as 10% (900,000 times) is reached,
Pr. 255 bit 3 is turned on and also an alarm is output to the Y90 signal.
Control circuit capacitor life display (Pr. 257)
The deterioration degree of the control circuit capacitor is displayed in Pr. 257 as a life.
In the operating status, the control circuit capacitor life is calculated from the energizing time and
temperature of the inverter's heatsink, and is counted down from 100%. As soon as the control
circuit capacitor life falls below 10%, Pr. 255 bit 0 is turned on and also an alarm is output to the
Y90 signal.
6 - 528
Bits
(binary)
1111
1110
1101
1100
1011
1010
9 1001
8 1000
7 0111
6 0110
5 0101
4 0100
3 0011
2 0010
1 0001
0 0000
Inrush Current
Cooling Fan Life
Limit Circuit Life
✔ ✔
✔ ✔
✔ ✔
✔ ✔
✔
—
✔
—
✔
—
✔
—
✔
—
✔
—
✔
—
✔
—
— —
— —
— —
— —
Parameter
Main Circuit Control Circuit
Capacitor Life Capacitor Life
✔ ✔
✔
—
✔
—
— —
✔ ✔
✔
—
✔
—
— —
✔ ✔
✔
—
✔
—
— —
✔ ✔
✔
—
✔
—
— —