4-3. Do-it-yourself maintenance
Key battery
Replace the battery with a new one if it is discharged.
You will need the following items:
n
l Small Phillips-head screwdriver
l Lithium battery CR1616
Replacing the battery
n
318
Remove the screw and cover.
Push the cover in the arrow
direction.
Remove the module.
Remove the 2 screws to take
out the lid.
Insert a new battery with the
"+" terminal facing up.