7. Maintenance and Inspection 7-5
Table7.1 Periodic inspection
Item Inspection Solution
Terminals,
mounting bolts,
connectors, etc.
Are all connection hardware
properly seated and bolts
tightened?
Reconnect the loose connectors and
tighten the bolts.
Cooling fins Are the fins dirty or dusty?
Clean with dry compressed air:
39.2×10
4
to 58.8 ×10
4
Pa
(4 to 6 kg ㆍ㎠ )
PCB
Is there any accumulation
of conductive material or
oil mist?
Clean with dry compressed air:
39.2×10
4
to 58.8 ×10
4
Pa
(4 to 6kg ㆍ㎠ )
Replace the inverter if the board can
not be cleaned,
Cooling fan
Is there any abnormal noise
or vibration?
Replace the cooling fan
Power element
Is there any accumulation
of conductive material or
oil mist?
Clean with dry compressed air:
39.2×10
4
to 58.8 ×10
4
Pa
(4 to 6 kg ㆍ㎠ )
Smoothing
capacitor
Is there any abnormal odor
or discoloration?
Replace the capacitor.
7-6 MOSCON-E7 User’s Manual
7.3 Part replacement
Inverter is composed of many parts and these parts must function
properly for normal operation of the inverter.
To maintain normal operation of the inverter for a long period of time,
it is recommended to perform a regular inspection and replace parts.
Inspection period may vary depending on the installation environment
and usage conditions.
Usage condition
• Ambient temperature(yearly average of 30℃)
• Load factor: 80% max.
• Operating rate: 12hrs max/day
Refer to the table below for the periodic inspection of the MOSCON-
E7.
Table 7.2 Part replacement
Part
Standard Replacement
Period
Method
Cooling fan 2~5 yrs Replace with new part.
Breaker relays -
Inspect to determine if the
replacement is required.
Aluminum capacitors
on PCBs
5yrs
Replace with new board.
Inspect to determine if
inspection is required.
Fuses 10yrs Replace with new part.
CAUTION
!
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