Maintenance and inspection
7
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45
7.7
Open Phase Check
Check Item
Operation
Lead cable check
Confirm if the lead cable for the power supply is wired as shown
in the following without any falling out, looseness or breaking from
the connecting part.
Input Power Supply
Check
Check the open phase voltage of input power supply with an elec-
tric tester. (Normal value: AC400/415/440V +10%, -15%)
Main switch (Q1M)
control
Turn ON the main power switch and check the open phase volt-
age of “2, 4, 6 of the main power switch (Q1M) with an electric
tester. If abnormal, replace the main power switch (Q1M).
