Mitsubishi Electric FR-F806-E Hardware Instruction Manual page 103

Inspection item
 Reinstallation of the internal fan (lower) (FR-F846-03250(132K) or higher)
(1) Fix the fan to the bracket with the installation screws. (tightening torque 1.4 to 1.9 N•m)
After confirming the orientation of the fan, reinstall the fan so that air flows as shown below.
(The "AIR FLOW" arrow on the fan side indicates the air flow direction.)
(2) Attach the bracket to the inverter.
(3) Reconnect the fan connector, and then place the connector case from the above.
(4) Reinstall the inverter front cover. (Refer to
NOTE
• Installing the fan in the opposite direction of air flow can cause the inverter life to be shorter.
• Prevent the cable from being caught when installing a fan.
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 capacitors 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.
• heck for external crack, discoloration, liquid leakage, etc. Judge that the capacitor has reached its life when the measured
capacitance of the capacitor reduced below 80% of the rating.
NOTE
• The inverter diagnoses the main circuit capacitor and control circuit capacitor by itself and can judge their lives. (Refer to the
FR-F800 Instruction manual (Detailed).)
102
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Bracket
AIR FLOW
<Fan side>
Connector case
Fan connector
page
Fan
Installation screw
Air flow
direction
Bracket
View of fan side and surrounding
Installation screw
Bracket
15.)
Fan Installation screw