Mitsubishi FREQROL-SF - Page 50

1 Troubleshooting
1.3 Checking method and
remedy of trouble
classification B
Item
Cause
Check
Remedy
(b) Between control circuit
common
- ground (The
control circuit common is
the OM terminal of the
terminal board TBl on the
SF-CA card.)
(c) Between main circuit -
control circuit common
(between each terminal of
the main circuit and OM
terminal)
(Note) The insulation resist-
ance should be 20MR or
more.
(See Appendixes l-l and 6(l).)
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