Mitsubishi Electric FR-E520 Instruction Manual page 219

(For the FR-E540-1.5K to 7.5K)
1) After confirming the orientation of
the fan, reinstall the fan to the
cover so that the arrow on the left
of "AIR FLOW" faces in the
opposite direction of the fan cover.
Note: If the air flow is set in the
wrong direction, the inverter
life can be shorter.
2) Reinstall the fan cover to the
inverter.
Run the cable through the wiring
groove to prevent it from being
caught between the chassis and
cover.
3) Reconnect the cable to the
connector.
4) Reinstall the front cover.
(2) Smoothing capacitors
A large-capacity aluminum electrolytic capacitor is used for smoothing the DC in the
main circuit, and an aluminum electrolytic capacitor is also used for stabilizing the
control power in the control circuit.
Their characteristics are adversely affected by ripple current, etc. When the inverter is operated
in an ordinary, air-conditioned environment, change the capacitors about every 5 years. When
5 years have elapsed, the capacitors will deteriorate more rapidly. Check the capacitors at
least every year (less than six months if the life will be expired soon). Check the following:
1) Case (side faces and bottom face for expansion)
2) Sealing plate (for remarkable warp and extreme crack)
3) Appearance, external cracks, discoloration, leakage.
When the measured capacitance of the capacitor has reduced below 80% of the
rating, replace the capacitor.
The capacitor life alarm is output to give an indication of replacement time. (Refer to
page 169.)
MAINTENANCE/INSPECTION
AIR FLOW
209
Wiring groove
Fan connector
6