Chapter 5 Maintenance, Inspection And Parts Replacement; Inspection Items; Periodic Inspection; Parts With A Service Life - Mitsubishi Electric MELSERVO-J5 Series User Manual

5
MAINTENANCE, INSPECTION AND PARTS
REPLACEMENT
5.1

Inspection items

Precautions
• Do not disassemble, repair, or modify the product.
• For repair and parts replacement, contact your local sales office.
• To prevent a malfunction, do not perform an insulation resistance test (megger test) on the servo amplifier.

Periodic inspection

Perform the following inspections.
• Check for loose terminal block screws. Retighten any loose screws.
• Check the cables and the like for scratches or cracks. Inspect them periodically according to operating conditions
especially when the servo motor is movable.
• Check that the connector is securely connected to the servo amplifier.
• Check that the wires are not coming out from the connector.
• Check for dust accumulation on the servo amplifier.
• Check for unusual noise generated from the servo amplifier.
• Make sure that the emergency stop circuit operates properly such that an operation can be stopped immediately and a
power is shut off by the emergency stop switch.
5.2

Parts with a service life

The service life of the following parts is listed below. In addition, the service life varies depending on the operating methods
and environment. If any fault is found in a part, it is necessary to replace it immediately regardless of its service life. For parts
replacement, please contact your local sales office.
Part name
Smoothing capacitor
Relay
Cooling fan
Absolute position battery
Smoothing capacitor
The service life of the capacitor is 10 years (with a three-phase power supply input) under continuous operation in air-
conditioned environments (ambient temperatures of 40 °C or less at altitudes of up to 1000 m and 30 °C or less at altitudes of
over 1000 m and up to 2000 m). Ripple currents or other factors will deteriorate the characteristic of the smoothing capacitor.
The service life of the capacitor greatly varies depending on ambient temperature and operating conditions.
Relays
Contact faults occur due to contact wear arisen from switching currents. A relay will reach the end of its service life if the
following actions are performed a total of 100,000 times: powering on the servo amplifier, inputting the EM1 command (Forced
stop 1), and inputting the quick stop command from the servo controller. In addition, the service life of a relay may vary
depending on the power supply capacity.
Recommended service life
10 years
Total number of times of power-on, forced stop by EM1 (Forced stop 1), and
sudden stop command from controller: 100,000
50,000 hours to 70,000 hours (7 to 8 years)
Refer to "ABSOLUTE POSITION DETECTION SYSTEM" in the following
manual.
MR-J5 User's Manual (Hardware)
5 MAINTENANCE, INSPECTION AND PARTS REPLACEMENT
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5.1 Inspection items
5