Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 756 / 826

Inspection Maintenance and inspection
8 - 4
8.1.4 Display of the life of the inverter parts
The self-diagnostic alarm is output when the life span of the control circuit capacitor, cooling fan,
each parts of the inrush current limit circuit is near to give an indication of replacement time. For
the life check of the main circuit capacitor, the alarm signal (Y90) will not be output if a measuring
method of is not performed. (Refer to the description below.)
The life alarm output can be used as a guideline for life judgement.
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.
Read the setting of parameter 255.
When the life alarm output level is reached, the bits are set as follows.
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 40% of the predetermined speed
Tab. 8-2: Guideline for the alarm signal output
I001262E
Fig. 8-1: Read parameter 255
I001261E
Fig. 8-2: Bits of parameter 255
Call up Pr. 255
Read the setting of Pr. 255
The bit image is displayed
in decimal.
Control circuit capacitor life
Main circuit capacitor life
Cooling fan life
Inrush current limit circuit life