8. MAINTENANCE
8-26
8.5 Overhaul Parts
The parts listed in Table 8.4 will deteriorate with age. For maintenance, inspect periodically.
Table 8-4 Periodical Parts Inspection
No. Parts
Average replacement
interval
Method of replacement and others
1 Capacitors for main circuit
smoothing
5 years Replace with new one.
Load rate:
50% maximum of the amplifier’s rated
output current.
Working condition:
Year-round average temp. 106°F (40°C)
2 Cooling fan motor
5 years Replace with new one.
Working condition:
Year-round average temp. 106°F (40°C)
3 ER3V 3 years Replace with new one.
ER6V 6 years Replace with new one.
1. Capacitor for main circuit smoothing
• If the Servo Amplifiers have been stored for over 3 years, consult us.
The capacity of the capacitor for main circuit smoothing is reduced depending on the motor output
current and the frequency of on-off switching of the power supply during operation. This can cause
the capacitor to malfunction.
• If the capacitor is used under conditions in which the average temp. is 106°F (40°C), and the Servo
Amplifier’s rated output current exceeds 50% on average, replace it with a new one every 5 years.
• If the capacitor is used in an application requiring the frequency of on-off switching the power to
exceed 30 times a day, consult us.
2. Cooling fan motor
• The PY2 Servo Amplifier is designed to comply with pollution level 2 (IEC 664-1/2.5.1).
Since it is not designed to be oil- or dust-proof, use the Servo Amplifier in a pollution level 2 or better
(i.e. pollution level 1 or 2) environment.
• The PY0A050, PY0A100 and PY0A150 Servo Amplifiers have built-in cooling fan motors.
Be sure to maintain a 50-mm spaces upper and below amplifier.
If the space is narrower, the static pressure of the cooling fun will be reduced and the parts will
deteriorate, causing the motor to malfunction.
When an abnormal noise is heard, or oil or dust adheres to the cooling fan, it must be replaced.
The estimated life of the cooling fan is 5 years under a year-round average temp. of 106°F (40°C).
3. Lithium battery
• The normal replacement interval of our recommended lithium battery is its estimated life.
The life of the lithium battery will be reduced if the frequency of power supply on-off switching is high
or if the motor remains unused for a long time.
If the battery voltage is 3.6 V or less when inspected, replace with new one.
Lithium battery for
absolute sensor
Since all overhauled Servo Amplifiers are shipped with the user settings left as they are, be
sure to confirm them before operating these Servo Amplifiers.
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