Table of Contents
Advertisement
6.1.3
Daily and periodic inspection
Area of
Inspection Item
Inspection
Surrounding
environment
General
Overall unit
Power supply voltage
General
Conductors, cables
Main circuit
Terminal block
Smoothing aluminum
electrolytic capacitor
Relay
Operation check
Control
circuit,
Protective
Overall
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heatsink
Description
Check the surrounding air 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 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 parts.
(4) Check for stains.
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Check for 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
page 278.)
Check that the operation is normal and no
chatter is heard.
(1) Check that the output voltages across
phases with the inverter operated alone
is balanced.
(2) Check that no fault is found in protective
and display circuits in a sequence
protective operation test.
(1) Check for unusual odors 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 main circuit capacitor. (Refer to
page 278.)
(1) Check for unusual vibration and noise.
(2) Check for loose screws and bolts.
(3) Check for stains.
(1) Check for clogging.
(2) Check for stains.
Inspection items
Interval
Corrective Action at
Periodic
Daily
Alarm Occurrence
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.
Customer's
Check
6
277
Advertisement
Table of Contents
