Mitsubishi Electric 800 Series Instruction Manual page 152

• 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.
 Life display of the relay contacts of terminals A, B, and C (Pr.507)
• The degree of deterioration of the relay contacts of terminals A, B, and C is displayed in Pr.507.
• The number of times the contacts of relay turn ON is counted down from 100% (0 time) by 1% (500 times). When the
counter reaches 10% (45,000 times), bit 6 of Pr.255 turns ON and a warning is output by the Y90 signal.
• Any value can be set in Pr.507.
 Life display of the inverter module (Pr.509)
• The degree of deterioration of the inverter module is displayed in Pr.509.
• The degree of deterioration of the inverter module is determined by the change in the surrounding air temperature of the
module. (The degree is counted down from 100% (no deterioration).) When the remaining life of the inverter module falls
below 15%, bit 8 of Pr.255 turns ON and a warning is output by the Y90 signal.
 Environmental impact diagnosis function (corrosion level display)
(Pr.198)
• The risk of the inverter's corrosive damage (degree of corrosion) can be checked by using a metal corrosion sensor.
• The degree of corrosion is monitored using the metal corrosion sensor (the degree is counted up from level 1). Use Pr.198
to check the corrosion level. When level 3 is reached, bit 9 of Pr.255 turns ON and a warning is output by the Y90 signal.
• The following table shows the details of the corrosion level.
Possibility of
Level
danger
1 0% to 5%
2 6% to 24%
3 25% to 100%
*1 Means the remaining service life from when the level is reached. For example, a fault may occur after 4 months if level 3 is reached in a month,
and after 12 years if level 3 is reached in 3 years.
Definition
Corrosion that may affect the inverter is very
unlikely to occur.
Corrosion that may affect the inverter is likely to
occur. Users should improve the environment
(by a filter or ventilation).
Corrosion that may affect the inverter is very
likely to occur. Users should improve the
environment (by a filter or ventilation). Consider
replacing the inverter early as required.
Remaining design life (estimation)
—
Corrosive damage may cause faults of the
inverter in a period 16 times as long as the
service life so far.
Corrosive damage may cause faults of the
inverter in a period 4 times as long as the
service life so far.
7. (E) Environment Setting Parameters
7.13 Inverter parts life display
1
2
3
4
5
6
7
Warning
*1
output
8
Not output
Not output 9
Output
10
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