Mitsubishi Electric FATEC FR-A800 Manual page 144

8
LIFE OF INVERTER PARTS
(2) Life display of the inrush current limit circuit (E701 (Pr.256))
• The life of the inrush current limit circuit (relay, contactor and inrush resistor) is displayed in
E701 (Pr.256).
• The number of contact (relay, contactor, thyristor) ON times is counted, and it is counted
down from 100% (0 time) every 1%/10,000 times.
As soon as 10% (900,000 times) is reached, E700 (Pr.255) bit 3 is turned ON and also a
warning is output to the Y90 signal.
(3) Life display of the control circuit capacitor (E702 (Pr.257))
• The deterioration degree of the control circuit capacitor is displayed in E702 (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%, E700 (Pr.255) bit 0 is turned ON
and also a warning is output to the Y90 signal
(4) Life display of the main circuit capacitor (E703, E704 (Pr.258, Pr.259))
• The deterioration degree of the main circuit capacitor is displayed in E703 (Pr.258).
• With the main circuit capacitor capacity at factory shipment as 100%, the capacitor life is
displayed in E703 (Pr.258) every time measurement is made.
When the measured value falls to 85% or lower, E700 (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.
1) Check that the motor is connected to the inverter and stopped.
2) Set "1" (measuring start) in E704 (Pr.259).
3) Turn OFF the power of the inverter. The inverter applies DC voltage to the motor to
measure the capacitor capacity while the inverter is OFF.
4) After confirming that the power lamp is OFF, turn ON the power again.
5) Check that "3" (measurement complete) is set in E704 (Pr.259), read E703 (Pr.258), and
check the deterioration degree of the main circuit capacitor.
E704 (Pr.259) Description
0 No measurement
1 Start measurement
2 During measurement
3 Measurement complete
8 Forced end
9 Measurement error
REMARKS
Initial value
Measurement starts when the
power supply is switched OFF.
Only displayed and cannot be set.
8.2 Inverter parts life display
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