Daily And Periodic Inspection - Mitsubishi FR-A846-00023 Instruction Manual

5.1.3

Daily and periodic inspection

Area of Inspection
inspection item
Surrounding
environment
General Overall unit
Power supply
voltage
General
Conductors,
cables
Transformer/
reactor
Main
circuit
Terminal block
Smoothing
aluminum
electrolytic
capacitor
Relay/
contactor
Resistor
Operation
check
Control
circuit,
protective
Overall
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Internal fan
Cooling
system
Heatsink
Description
Check the ambient temperature, humidity, dirt,
corrosive gas, oil mist, etc.
Check for unusual vibration and noise.
Check for dirt, oil, and other foreign material.
Check that the main circuit voltages and control
voltages are normal.

(1) Check with megger (across main circuit
terminals and earth (ground) terminal).
(2) Check for loose screws and bolts.
(3) Check for overheat traces on the parts.
(4) Check for stain.
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Check for unusual odor and abnormal increase of
whining sound.
Check for a damage.
(1) Check for liquid leakage.
(2) Check for safety valve projection and bulge.
(3) Visual check and judge by the life check of the
main circuit capacitor. (Refer to
Check that the operation is normal and no
chattering sound is heard.
(1) Check for crack in resistor insulation.
(2) Check for a break in the cable.
(1) Check that the output voltages across phases
are balanced while operating the inverter
alone.
(2) Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
(1) Check for unusual odor and discoloration.
(2) Check for serious rust development.
(1) Check for liquid leakage in a capacitor and
deformation trace.
(2) Visual check and judge by the life check of the
control circuit capacitor. (Refer to
(1) Check for unusual vibration and noise.
(2) Check for loose screws and bolts.
(3) Check for stain.
(1) Check for clogging.
(2) Check for stain.
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Inspection
interval
Periodic
Daily
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page 96.)
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page 96.)
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Inspection item
Corrective action Check
at fault by the
occurrence user
Improve the
environment.
Check fault location
and retighten.
Clean.
Inspect the power
supply.
Contact the
manufacturer.
Retighten.
Contact the
manufacturer.
Clean.
Contact the
manufacturer.
Contact the
manufacturer.
Stop the equipment
and contact the
manufacturer.
Stop the equipment
and contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Stop the equipment
and contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Replace the fan.
Check fault location
and retighten.
Clean.
Clean.
Clean.
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