Maintenance and inspection
7
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44
7.5
Check battery unit
The robot controller has a battery unit that backs up the important program files for user
data in the CMOS memory.
A battery alarm indicates when a battery has expired and must be replaced. The
programming pendant display and the message "Memory battery weak" appears at the
bottom of the display.
Check that the message is NOT not displayed on the programming pendant.
7.6
Check the power supply
Check the voltage of 1, 3, 5 terminal of the main power switch (Q1M) with an electric tester.
Fig. 7-4: Main switch
Measuring Items
Terminals
Correct Value
correlate voltage
between
1 and 3 (R-S),
3 and 5 (S-T),
1 and 5 (R-T)
400/415/440V +/- 10%
Voltage between earth (phase
ground)
between
1 and E (R-E),
5 and E (R-E)
230/240/255V +/- 10%
between
3 and E (S-G)
About 0V
1
3
5
2
4
6