Mitsubishi Electric FR-A800, Instruction Manual

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(E) Environment setting parameters Parameters
5 - 224
Life display of the control circuit capacitor (Pr. 257)
●
The deterioration degree of the control circuit capacitor is displayed in Pr. 257.
●
In the operating status, the control circuit capacitor life is calculated from the energization time
and temperature, 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 a warning is output to the Y90 signal.
Life display of the main circuit capacitor (Pr. 258, Pr. 259)
(Standard models and IP55 compatible models)
●
The deterioration degree of the main circuit capacitor is displayed in Pr. 258.
●
With the main circuit capacitor capacity at factory shipment as 100%, the capacitor life is displayed
in Pr. 258 every time measurement is made. When the measured value falls to 85% or lower, Pr. 255
bit 1 is turned ON and also a warning is output to the Y90 signal.
●
Measure the capacitor capacity according to the following procedure and check the deterioration
degree of the capacitor capacity.
Check that the motor is connected and at a stop.
Set "1" (measuring start) in Pr. 259.
Switch the power OFF. The inverter applies DC voltage to the motor to measure the capacitor
capacity while the inverter is OFF.
#
After confirming that the power lamp is OFF, turn ON the power again.
,
Check that "3" (measurement complete) is set in Pr. 259, read Pr. 258, and check the deteriora-
tion degree of the main circuit capacitor.
NOTE For accurate life measurement of the main circuit capacitor, wait three hours or longer after turn-
ing OFF. The temperature left in the main circuit capacitor affects measurement.
Pr. 259 Description Remarks
0 No measurement Initial value
1 Measurement start
Measurement starts when the power supply is
switched OFF
2 During measurement
Only displayed and cannot be set
3 Measurement complete
8 Forced end
9 Measurement error
Tab. 5-91: Parameter 259