Mitsubishi FR-A846-00023, Инструкция по эксплуатации

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Inspection item
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
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 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-A800 Instruction manual (Detailed).)
 Relays
To prevent a contact fault, etc., relays must be replaced according to the cumulative number of switching times (switching life).