Mitsubishi Electric 800 Series Instruction Manual page 186

NOTE
• When the main circuit capacitor life is measured under the following conditions, "forced end" (Pr.259 = "8 or 18"), or
"measurement error" (Pr.259 = "9 or 19") may occur, or the status may remain in "measurement start" (Pr.259 = "1 or 11").
To perform measurement, first eliminate the following conditions. Under the following conditions, even if "measurement
complete" (Pr.259 = "3 or 13") is reached, measurement cannot be performed correctly.
Terminals R1/L11, S1/L21 or DC power supply is connected to terminals P/+ and N/-.
The power supply is switched ON during measurement.
The motor is not connected to the inverter.
The motor is running (coasting).
The motor capacity is smaller than the inverter capacity by two ranks or more.
The inverter is tripped or a fault occurred while the power was OFF.
The inverter output is shut off with the MRS signal.
The start command is given while measuring.
The applied motor setting is incorrect.
• Operation environment: surrounding air temperature (annual average of 40°C (free from corrosive gas, flammable gas, oil
mist, dust and dirt)). Output current (80% of the inverter rating)
• Since repeated inrush currents at power ON will shorten the life of the converter circuit, frequent starts and stops of the
magnetic contactor must be avoided.
WARNING
• When measuring the main circuit capacitor capacity (Pr.259 = "1 or 11"), the DC voltage is applied to the motor for about 1 s at power
OFF. Never touch the motor terminal, etc. right after powering OFF to prevent an electric shock.
 Life display of the cooling fan
• When the cooling fan approaches the end of its life and a low rotation speed is detected for the cooling fan, the fan alarm
(FN) is displayed on the operation panel or the parameter unit. As an alarm display, Pr.255 bit 2 is turned ON and also a
warning is output to the Y90 signal and Alarm (LF) signal.
• For the terminal used for the LF signal, set "98" (positive logic) or "198" (negative logic) in any of Pr.190 to Pr.196 (Output
terminal function selection).
NOTE
• When the inverter is mounted with two ore more cooling fans, "FN" is displayed with one or more fans with speed of 50%
or less.
• 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.
• For replacement of each part, contact the nearest Mitsubishi Electric FA center.
 Estimated residual life display of the main circuit capacitor (Pr.506)
(Standard models)
• Even when the power supply cannot be turned OFF, the remaining life of the main circuit capacitor can be estimated
without stopping the operation. Note that the remaining life of the main circuit capacitor estimated by this function is
theoretical, and should be used as a guideline only.
• The estimated residual life of the main circuit capacitor is displayed in Pr.506.
• The remaining life of the main circuit capacitor is calculated from the energization time and the inverter output power (100%
= Start of service life). When the remaining life of the main circuit capacitor falls below 10%, bit 5 of Pr.255 Life alarm
status display turns ON and a warning is output by the Y90 signal.
5. PARAMETERS
5.4 (E) Environment setting parameters
3
4
5
5
5
6
7
8
9
10
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