First Step Of Troubleshooting - Mitsubishi FREQROL-SFJ Maintenance Manual

13. Is supply voltage normal?
Does it change from time to time?
8.2

First step of troubleshooting

Perform the following check:
Power supply voltage should be 2OOV+:$, 50/60Hz, or
In any case, it should not go down below -15% of 200V.
o Check if the supply-voltage drops at a specific time
everyday.
Check if the supply voltage drops at start of a speci-
fic machine in the factory.
Are the peripheral control devices or functions in good
condition?
o Are the NC and programmable controller wired proper-
ly?
o Visually check cables and other components for condi-
tion.
Is temperature inside and outside the control equpment
below 55OC?
Visually check the control equipment.
o Cards, circuit patterns, etc.
o Looseness of wire, damage, foreign matter, etc.
All control power supplies of IM-PW2 card meet the
specified voltages?
O u t p u t v o l t a g e ,
n o m i n a l
Check pin
Common
N o r m a l v o l t a g e
P 1 5
C H 2 8 c H 3 4
c H 3 5
C H 2 7
P 2 4
C H 3 6 C H 2 6
C H 3 5