Maintenance and inspection
Inspection
FR-A700 EC
8 - 13
Replacement procedure of the cooling fan when using a heatsink protrusion attachment
(FR-A7CN)
When replacing a cooling fan, remove a top cover of the heatsink protrusion attachment and per-
form replacement. After replacing the cooling fan, replace the top cover in the original position.
Smoothing capacitors
A large-capacity aluminum electrolytic capacitor is used for smoothing in the main circuit DC
section, and an aluminum electrolytic capacitor is used for stabilizing the control power in the
control circuit. Their characteristics are deteriorated by the adverse effects of ripple currents,
etc.
The replacement intervals greatly vary with the ambient temperature and operating conditions.
When the inverter is operated in air-conditioned, normal environment conditions, replace the ca-
pacitors about every 10 years.
The appearance criteria for inspection are as follows:
●
Case: Check the side and bottom faces for expansion
●
Sealing plate: Check for remarkable warp and extreme crack.
●
Check for external crack, discoloration, fluid leakage, etc. Judge that the capacitor has
reached its life when the measured capacitance of the capacitor reduced below 80% of the
rating.
Relays
To prevent a contact fault, etc., relays must be replaced according to the cumulative number of
switching times (switching life).
Fig. 8-11:
Replacement procedure of the cooling fan
when using a heatsink protrusion attachment
I001356E
Top cover
Summary of Contents for FR-A700 EC
Page 2: ......
Page 4: ......
Page 24: ...Description of the Case Product Checking and Part Identification 1 4 ...
Page 38: ...Enclosure design Installation 2 14 ...
Page 774: ...Specifications FR A 740 01800 to 12120 Appendix A 4 ...
Page 820: ...Parameter list with instruction codes Appendix A 50 ...
Page 825: ......