Download  Print this page

Precautions For Maintenance And Inspection - Mitsubishi Electric FR-E720-0.1K Instruction Manual

Fr-e700 series.
Hide thumbs

Advertisement

Table of Contents

9 PRECAUTIONS FOR MAINTENANCE AND INSPECTION

The inverter is a static unit mainly consisting of semiconductor devices. Daily inspection must be performed to prevent any
fault from occurring due to the adverse effects of the operating environment, such as temperature, humidity, dust, dirt and
vibration, changes in the parts with time, service life, and other factors.
REMARKS
 For maintenance/inspection and parts life, also
Precautions for maintenance and inspection
For some short time after the power is switched OFF, a high voltage remains in the smoothing capacitor. When accessing the
inverter for inspection, wait for at least 10 minutes after the power supply has been switched OFF, and then make sure that
the voltage across the main circuit terminals P/+ and N/- of the inverter is not more than 30VDC using a tester, etc.
9.1
Inspection items
Area of
Inspection
Inspection
Item
Surrounding
Check the surrounding air temperature,
environment
humidity, dirt, corrosive gas, oil mist, etc.
Check for unusual vibration and noise.
General
Overall unit
Check for dirt, oil, and other foreign material.
Power supply
Check that the main circuit voltages are normal.
voltage

(1) Check with megger (across main circuit
(2) Check for loose screws and bolts.
General
(3) Check for overheat traces on the parts.
(4) Check for stains.
(1) Check conductors for distortion.
Conductors,
(2) Check cable sheaths for breakage and
cables
Terminal
Main circuit
Check for damage.
block
(1) Check for liquid leakage.
Smoothing
(2) Check for safety valve projection and bulge.
aluminum
(3) Visual check and judge by the life check of
electrolytic
capacitor
Check that the operation is normal and no
Relay
chatter is heard.
(1) Check that the output voltages across phases
Operation
(2) Check that no fault is found in protective and
check
Control
(1) Check for unusual odors and discoloration.
circuit,
Overall
Protective
(2) Check for serious rust development.
circuit
(1) Check for liquid leakage in a capacitor and
Aluminum
(2) Visual check and judge by the life check of
electrolytic
capacitor
(1) Check for unusual vibration and noise.
Cooling fan
(2) Check for loose screws and bolts.
Cooling
(3) Check for stains.
system
(1) Check for clogging.
Heatsink
(2) Check for stains.
Description
terminals and earth (ground) terminal).
deterioration (crack, discoloration, etc.).
the main circuit capacitor (
Refer to
Chapter 4 of the FR-E700 Instruction Manual
(Applied).)
with the inverter operated alone is balanced.
display circuits in a sequence protective
operation test.
deformation trace.
the main circuit capacitor (
Refer to
Chapter 4 of the FR-E700 Instruction Manual
(Applied).)
refer to the FR-E700 Instruction Manual (Applied).
Interval
Corrective Action at Alarm
Periodic
Daily

Improve environment
Check alarm location and retighten

Clean
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.
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Stop the device and contact the
manufacturer.
Contact the manufacturer
Contact the manufacturer
Replace the fan
Fix with the fan cover fixing screws
Clean
Clean
Clean
Inspection items
Customer's
Occurrence
Check
9
46

Advertisement

Table of Contents

   Also See for Mitsubishi Electric FR-E720-0.1K

   Related Manuals for Mitsubishi Electric FR-E720-0.1K

   Related Content for Mitsubishi Electric FR-E720-0.1K

Comments to this Manuals

Symbols: 0
Latest comments: