7.3 Periodic Maintenance
The drive has various "maintenance monitors." This feature provides advance maintenance warning and eliminates the
need to shut down the entire system for unexpected problems. The drive allows the user to check the following maintenance
periods.
• Cooling Fan
• Electrolytic Capacitors (Main Circuit)
• Inrush Prevention Circuit
• IGBT
u
Replacement Parts
Table 7.3
contains the estimated performance life of components that require replacement during the life of the drive. Only
use OYMC replacement parts for the appropriate drive model and revision.
Table 7.3 Estimated Performance Life
Component
Estimated Performance Life
Cooling Fan
2 ~ 3 years
Electrolytic Capacitors (Main Circuit)
10 years
<1>
<1> The drive has few serviceable parts and may require complete drive replacement.
NOTICE: Estimated performance life based on specific usage conditions. These conditions are provided for the purpose of replacing
parts to maintain performance. Some parts may require more frequent replacement due to poor environments or rigorous use.
Usage conditions for estimated performance life:
• Ambient temperature: Yearly average of 30 °C
• Load factor: 80% maximum
• Operation time: 12 hours a day
n
Performance Life Monitors
The drive calculates the maintenance period for components that may require replacement during the life of the drive. A
percentage of the maintenance period is displayed on the LED digital operator by viewing the appropriate monitor
parameter.
When the maintenance period reaches 100%, there is increased risk that the drive may malfunction. OYMC recommends
checking the maintenance period regularly to ensure maximum performance life.
Refer to Recommended Periodic Inspection on page 142
for more details.
Table 7.4 Performance Life Monitors Used for Component Replacement
Parameter
Component
Contents
U4-04
Cooling Fan
Displays the accumulated cooling fan operation time as a percentage of the specified
maintenance period (displayed in percent %).
U4-05
Main Circuit (DC bus)
Electrolytic Capacitors
Displays the accumulated time the capacitors are used as a percentage of the specified
maintenance period.
U4-06
Inrush (pre-charge) relay
Displays the number of times the drive is powered up as a percentage of the performance life
of the inrush circuit.
U4-07
IGBT
Displays the percentage of the maintenance period reached by the IGBTs.
n
Related Drive Parameters
Table 7.5 Maintenance Parameter Settings
Parameter
Parameter Name
Operator Display
o4-03
Cooling Fan Maintenance Setting (Operation Time)
o4-05
Capacitor Maintenance Setting
o4-07
Inrush Prevention Relay (pre-charge) Maintenance Setting
o4-09
IGBT Maintenance Setting
NOTICE: After replacing parts, reset the appropriate maintenance parameters (o4-03, o4-05, o4-07, and o4-09) to 0. If these parameters
are not reset, the function will continue to count down the performance life of the new replaced components.
7.3 Periodic Maintenance
144
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
