Mitsubishi Electric 800 Series Instruction Manual page 159

• 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.
158
7. (E) Environment Setting Parameters
7.15 Inverter parts life display
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.
Warning
*1
output
Not output
Not output
Output