Instruction manual

Replacement of parts

PRECAUTIONS FOR MAINTENANCE AND INSPECTION

(2) 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:

1) Case: Check the side and bottom faces for expansion

2) Sealing plate: Check for remarkable warp and extreme crack.

3) 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.

(3) Relays

To prevent a contact fault, etc., relays must be replaced according to the cumulative number of switching times

(switching life).

z Removal

1) Remove the front cover and wiring cover. (Refer to page 4.)

2) Push the catches from above and remove the fan cover.

3) Disconnect the fan connectors.

4) Remove the fan.

z Reinstallation

1) After confirming the orientation of the fan, reinstall the fan so that the

arrow on the left of "AIR FLOW" faces up.

2) Reconnect the fan connectors.

When wiring, use care to avoid the cables being caught by the fan.

3) Reinstall the fan cover.

AIR FLOW

Fan cover

Fan

Fan connectors

<Example: FR-V520-5.5K>

CAUTION

Installing the fan in the opposite air flow direction can

cause the inverter life to be shorter.