Mitsubishi Electric CR750-D Series, Instruction Manual

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5-106 Maintenance and inspection procedures
5Maintenance and Inspection
5.3 Maintenance and inspection procedures
The procedures for carrying out periodic maintenance and inspection are described below. Thoroughly
comprehend the procedures, and follow the instructions. This work can be commissioned to the Mitsubishi Service
Dept. for a fee. (Never disassemble, etc., any of the parts not described in this section.)
The maintenance parts required for the maintenance and inspection are shown in Page 111, "5.4 Maintenance
parts" . Contact your dealer for these parts when required.
5.3.1 Replacing the battery
While power of controller is turned off, the programs must be saved by the backup battery. The robot arm also uses
backup batteries to save the position data of an encoder. The batteries are installed when the robot is shipped
from the factory, but as these are consumable parts, they must be replaced periodically by the customer.
The guideline for replacing the lithium battery is one year, but this will differ according to the robot's usage state.
There are the kind of the errors about the battery shown in
Table 5-3 . If error 7500 occurs, please exchange the
batteries of the robot arm and the controller simultaneously.
Table 5-3 ： The error about the battery
The method of replacing the battery of the controller is shown below. Refer to the separate "ROBOT ARM
SETUP & MAINTENANCE" about robot arm's battery.
About the purchase of the battery, refers to
Page 111, "5.4 Maintenance parts" .
If error No. 7500 or 112n occurs, the program data and other data in the controller is
lost and it becomes necessary to load the data again.
Replace the batteries for the controller and robot arm at the same time. Replace the
controller battery within 3 minutes after removing the old battery.
It is also recommended to save programs and position data on the personal
computer side via the RT ToolBox 2 and so forth in advance.
Section Error number Description Disposition
Controller
7520 The exhausting time is over.
Exchange the batteries.
7510 Voltage is falling.
7500 Voltage fell.
Backup data cannot be
secured.
Rob
o
t
ar
m
7520 The exhausting time is over.
Exchange the batteries.
133n Note1)
Note1) "n" shows the axial number.
Voltage is falling.
112n
The absolute position data of the encoder
disappeared. Backup data cannot be
secured.
CAUTION
CAUTION