Mitsubishi Electric 800 Series Instruction Manual page 185

NOTE
• When using an option (FR-A8AY, FR-A8AR, FR-A8NC, FR-A8NCE, FR-A8NCG), the life can be output separately to the
Control circuit capacitor life (Y86) signal, Main circuit capacitor life (Y87) signal, Cooling fan life (Y88) signal, Inrush current
limit circuit life (Y89) signal, Estimated residual-life of main circuit capacitor (Y248) signal, ABC1 relay contact life (Y249)
signal, and ABC2 relay contact life (Y250) signal.
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 Life display of the inrush current limit circuit (Pr.256) (Standard models)
• The life of the inrush current limit circuit (relay, contactor and inrush resistor) is displayed in 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, Pr.255 bit 3 is turned ON and also a warning is output to
the Y90 signal.
 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)
• For accurate life measurement of the main circuit capacitor, wait three hours or longer after turning OFF.
The temperature left in the main circuit capacitor affects measurement.
• 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.
1.
Check that the motor is connected and at a stop.
2.
Set "1 or 11" (measuring start) in Pr.259.
3.
Switch the power OFF. 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 or 13" (measurement complete) is set in Pr.259, read Pr.258, and check the deterioration degree of
the main circuit capacitor.
Pr.259
0 No measurement
1, 11 Measurement start
2, 12 During measurement
3, 13 Measurement complete
8, 18 Forced end
9, 19 Measurement error
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5. PARAMETERS
5.4 (E) Environment setting parameters
Description
Initial value
Measurement starts when the power supply is switched OFF.
(Only once when Pr.259 = "1")
When Pr.259 = "11", the measurement starts every time the
power supply is turned OFF.
Only displayed and cannot be set. (When "11" is set in Pr.259,
"12, 13, 18, or 19" is displayed.)
Remarks