Mitsubishi Electric FR-A800 Series Instruction Manual page 362

 Life display of the main circuit capacitor (Pr.258, Pr.259) (Standard
models and IP55 compatible 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 degree of deterioration for 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, bit 1 of Pr.255 is turned ON (set to 1) and the Y90
signal is also output as an alert.
• Measure the capacitor capacity according to the following procedure and check the degree of deterioration for 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 degree of deterioration
for the main circuit capacitor.
0
1, 11
2, 12
3, 13
8, 18
9, 19
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.
-
-
-
-
-
-
-
-
-
-
• 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.
Downloaded from ManualsNet.com
Pr.259 Description
No measurement
Start measurement
During measurement
Measurement complete
Forced end
Measurement error
FR-HC2, FR-XC (common bus regeneration mode), FR-CV, MT-RC, or a sine wave filter (when Pr.72 = "25") is
connected.
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 output is shut off 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.
search engine
Remarks
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.)
5.7 (E) Environment setting parameters
1
2
3
4
5
6
7
8
9
10
361
5. PARAMETERS