Daily And Periodic Inspection - Mitsubishi Electric FR-S500 Series Instruction Manual

7.7.4

Daily and periodic inspection

Inspection
Item
Surrounding
environment
Overall unit
Power supply
voltage
General
Conductors,
cables
Transformer/
reactor
Terminal block Check for damage.
Smoothing
aluminum
electrolytic
capacitor
Relay/
contactor
Resistor
Inspection Item
Check the ambient temperature,
humidity, dirt, corrosive gas, oil mist
, etc
Check for unusual vibration and
noise
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 in whining
sound.
(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 page 73)
Check that the operation is normal
and no chatter is heard.
(1)Check for crack in resistor
insulation.
(2)Check for a break in the cable.
Precautions for maintenance and inspection
Interval
*1
71
Corrective
Action at Alarm
Occurrence
Improve
emvironment
Check alarm
location and
retighten
Inspect the power
supply
Contact the
manufacturer
Retighten
Contact the
manufacturer
Clean
Contact the
manufacturer
Contact the
manufacturer
Stop the device
and contact the
manufacturer.
Stop the device
and contact the
manufacturer.
Contact the
manufacturer
Contact the
manufacturer
Contact the
manufacturer
Contact the
manufacturer
Contact the
manufacturer
7