4742-E P-11
SECTION 1 INVERTER UNIT (MIV UNIT)
3.
Cautions on Changing Units
3-1.
General Precautions
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The items that require special attention when changing MIV unit are indicated below.
WARNING
(1) It is necessary to set a controller ID number after changing MIV unit. Set the controller ID num-
ber referring to 5 "Controller ID Number" in this manual or the circuit diagram after changing the
MIV unit.
(2) Unit type of MIV units differs according to the unit capacity, the control board and the software
(ROM). When changing a unit, make sure to use the unit of the same type.
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WARNING
MIV unit has a large-capacitance capacitor in the unit. When changing MIV unit, shut off the
power and wait until the charge indicating lamp goes off. (Wait for at least 2 minutes after shutting
off the power.)
High voltage is applied to the upper and lower terminal blocks in the unit.
Do not remove the plastic terminal block cover while the power is on.
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