172
Inspection item
6.1.4
Display of the life of the inverter parts
The self-diagnostic alarm is output when the lifespan of the control circuit capacitor, cooling fan, each parts of the
inrush current limit circuit is near its end. It gives an indication of replacement time .
The life alarm output can be used as a guideline for life judgement.
For the life check of the main circuit capacitor, the alarm signal (Y90) will not be output if a measuring method of (2) is
not performed.
(Refer to page 173.)
(1) Display of the life alarm
·
Pr. 255 Life alarm status display
can be used to confirm that 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.
Parts
Judgement Level
Main circuit capacitor
85% of the initial capacity
Control circuit capacitor
Estimated 10% life remaining
Inrush current limit circuit
Estimated 10% life remaining (Power on: 100,000 times left)
Cooling fan
Less than 50% of the predetermined speed
Pr. 255
(decimal)
Bit
(binary)
Inrush Current
Limit Circuit Life
Cooling
Fan Life
Main Circuit
Capacitor Life
Control Circuit
Capacitor Life
15
1111
14
1110
13
1101
12
1100
11
1011
10
1010
9
1001
8
1000
7
0111
6
0110
5
0101
4
0100
3
0011
2
0010
1
0001
0
0000
: with alarm, : without alarm
POINT
Life check of the main circuit capacitor needs to be done by
Pr. 259
. (Refer to the following.)
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
bit0 Control circuit capacitor life
1
15
bit
7
0
bit1 Main circuit capacitor life
bit2 Cooling fan life
bit3 Inrush current limit circuit life
•
Pr.255
read
Bit image is displayed
in decimal
•
Pr.255
setting read
