PREVENTIVE MAINTENANCE PROCEDURE
CHALLENGER Series II Bulletin No. EL3
Maintenance Point
Frequency Interval
Procedure Information
The service life of the battery in the Mitshubishi PLC unit is three years. When the battery is nearly discharged the
“ALARM” indicator on the PLC will begin to flash. When this happens, replace the battery (M&R Part No. 1017147)
with in a week.
Every Three Years
Tools required:1 - Replacement battery M&R Part No.
1017147
1 - Small phillips screw driver
1. DO NOT turn “OFF” the electrical power to the equipment.
If the electrical power is not “ON”, turn it “ON”.
2. Open the access door on the lower electrical component
cabinet mounted to the indexer chassis.
3. Remove the communication cable from the CPU unit
using the small phillips screw driver. Open the access door
on the CPU unit to expose the battery and battery connec-
tor.
4. Remove the old battery from the holder on the access
door, then disconnect the battery by gently squeezing while
pulling down on the connector.
5. Install the new battery together with the connector.
Replace the battery in the holder on the access door and
close the access door.
6. Install the communication cable using the small phillips
screw driver.
081200MS
Battery Connector
WARNING!
WARNING! THE NEW BATTERY
MUST BE INSTALLED WITH IN FIVE
(5) MINUTES OF REMOVAL OF THE
OLD BATTERY. THIS WILL ENSURE
THE PRESERVATION OF DATA IN
THE PLC MEMORY.
105
The frequency of the following preventive maintenance procedure is
based on a 8 hour daily production shift or 40 hour work week.
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