Inverter Parts Life Display - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

• When the carrier frequency automatic reduction function is used, operation with the carrier frequency set to 3 kHz or higher
(Pr.72 ≥ 3) automatically reduces the carrier frequency for heavy-load operation as shown below.
Pr.260
Pr.570 setting
setting
0 (SLD), 1 (LD)
1
2 (ND), 3 (HD)
0 (SLD)
1 (LD)
0
2 (ND), 3 (HD)
NOTE
• Reducing the PWM carrier frequency is effective as a countermeasure against EMI from the inverter or for reducing leakage
current, but doing so increases the motor noise.
• When the PWM carrier frequency is set to 1 kHz or lower (Pr.72 ≤ 1), the increase in the harmonic current causes the fast-
response current limit to activate before the stall prevention operation, which may result in torque shortage. In this case,
disable the fast-response current limit in Pr.156 Stall prevention operation selection.
• The lower limit of carrier frequency after the reduction under PM sensorless vector control (low-speed range high-torque
characteristic enabled) is 6 kHz.
• During fast-response operation, the carrier frequency automatic reduction function is disabled.
Parameters referred to
Pr.156 Stall prevention operation selectionpage 409
Pr.570 Multiple rating settingpage 326
Pr.788 Low speed range torque characteristic
Pr.800 Control method selectionpage 215

5.7.19 Inverter parts life display

The degree of deterioration of the control circuit capacitor, main circuit capacitor, cooling fan, and inrush current limit circuit can
be diagnosed on the monitor.
When a part approaches the end of its life, an alarm can be output by self diagnosis to prevent a fault.
(Note that the life diagnosis of this function should be used as a guideline only, because with the exception of the main circuit
capacitor, the life values are theoretical calculations.)
Pr. Name
255
Life alarm status display
E700
256
Inrush current limit circuit life
*2
display
E701
257 Control circuit capacitor life
E702 display
258
Main circuit capacitor life display 100%
*2
E703
259
Main circuit capacitor life
*2
measuring
E704
*1 The setting range (reading only) for separated converter types is "0, 1, 4, or 5". The setting range (reading only) for IP55 compatible modes is "0
to 31".
Carrier frequency automatic reduction operation
FR-A820-04750(90K) or lower,
FR-A840-02600(90K) or lower
The carrier frequency will reduce automatically with continuous operation of 85% of the inverter rated
current or higher.
The carrier frequency will reduce automatically with
operation of 150% of the inverter ND rated current
or higher.
The carrier frequency will reduce automatically with continuous operation of 85% of the inverter rated
current or higher.
Without carrier frequency automatic reduction (Perform continuous operation with the carrier frequency
set to 2 kHz or lower or with less than 85% of the inverter rated current for the ND rating.)
Without carrier frequency automatic reduction
selectionpage 227
Initial value Setting range
0
(0 to 15)
100% (0 to 100%)
100% (0 to 100%)
(0 to 100%)
0, 1
0
(2, 3, 8, 9)
FR-A840-03250(110K) or higher
Continuous operation with the 85% or higher
inverter rated current for the ND rating reduces the
carrier frequency automatically.
Without carrier frequency automatic reduction
(Perform continuous operation with the carrier
frequency set to 2 kHz or lower or with less than
85% of the inverter rated current for the ND rating.)
Description
Displays whether or not the parts of the control circuit
capacitor, main circuit capacitor, cooling fan, and
*1
inrush current limit circuit have reached the life alarm
output level. Read-only.
Displays the deterioration degree of the inrush current
limit circuit. Read-only.
Displays the deterioration degree of the control circuit
capacitor. Read-only.
Displays the deterioration degree of the main circuit
capacitor. Read-only.
The value measured by Pr.259 is displayed.
Setting "1" and turning the power supply OFF starts the
measurement of the main circuit capacitor life.
If the setting value of Pr.259 becomes "3" after turning
the power supply ON again, it means that the
measurement is completed. The deterioration degree is
read to Pr.258.
5.7 (E) Environment setting parameters
1
2
3
4
5
6
7
8
9
10
341
5. PARAMETERS