Mitsubishi Electric C80 series Maintenance Manual page 17

(8) Maintenance, inspection and part replacement
CAUTION
Periodically back up the programs, tool data and parameters to avoid potential data loss. Also, back up
those data before maintenance and inspections.
The electrolytic capacitor's capacity will drop due to deterioration. To prevent secondary damage due to
capacitor's faults, Mitsubishi recommends the electrolytic capacitor to be replaced approx. every five years
even when used in a normal environment. Contact the Service Center or Service Station for replacements.
Never perform a megger test (measure the insulation resistance) of the drive unit. Failure to observe this
could lead to faults.
Do not replace parts or devices while the power is ON.
Do not short-circuit, charge, overheat, incinerate or disassemble the battery.
Be careful not to break the heat radiating fins during maintenance or replacement.
Perform the daily and periodic inspections according to the maintenance manual.
Do not place fingers or hands in the clearance when opening or closing any opening.
Periodically replace consumable parts such as batteries according to the instruction manual.
Do not touch the lead sections such as ICs or the connector contacts.
Do not place the controller or servo amplifier on metal that may cause a power leakage or wood, plastic or
vinyl that may cause static electricity buildup.
When replacing the controller or servo amplifier, always set the new unit settings correctly.
After maintenance and inspections are completed, confirm that the position detection of the absolute posi-
tion detector function is correct.
The electrolytic capacitor will generate gas during a fault, so do not place your face near the controller or
servo amplifier.
If an error occurs in the self diagnosis of the controller or servo amplifier, confirm the check details accord-
ing to the instruction manual, and restore the operation.
If an error occurs, remove the cause, secure the safety and then resume operation after alarm release.
The unit may suddenly restart after a power failure is restored, so do not go near the machine. (Design the
machine so that the operator safety can be ensured even if the machine restarts.)
Always turn the power OFF before touching the servomotor shaft or coupled machines, as these parts may
lead to injuries.
Do not go near the machine during test operations or during operations such as teaching. Doing so may
lead to injuries.