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Mitsubishi Electronics A800 Manual Do Utilizador

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Inspection item
87
5
5.1.3
Daily and periodic inspection

Oil component of the heat dissipation grease used inside the inverter may leak out. The oil component, however, is not flammable, corrosive, nor 
conductive and is not harmful to humans. Wipe off such oil component.

It is recommended to install a voltage monitoring device for checking the voltage of the power supplied to the inverter.

One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
NOTE
 • Continuous use of a leaked, deformed, or degraded smoothing aluminum electrolytic capacitor (as shown in the table above) 
may lead to a burst, breakage or fire. Replace such capacitor without delay.
Area of 
inspection
Inspection item
Description
Inspection 
interval
Corrective action at 
fault occurrence
Check 
by the 
user
Daily
Periodic
General
Surrounding 
environment
Check the surrounding air temperature, humidity, 
dirt, corrosive gas, oil mist, etc.
Improve the environment.
Overall unit
Check for unusual vibration and noise.
Check fault location and 
retighten.
Check for dirt, oil, and other foreign material.
Clean.
Power supply 
voltage
Check that the main circuit voltages and control 
voltages are normal.
Inspect the power supply.
Main circuit
General
(1) Check with megger (across main circuit 
terminals and earth (ground) terminal).
Contact the manufacturer.
(2) Check for loose screws and bolts.
Retighten.
(3) Check for overheat traces on the parts.
Contact the manufacturer.
(4) Check for stain.
Clean.
Conductors, cables
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and 
deterioration (crack, discoloration, etc.).
Contact the manufacturer.
Contact the manufacturer.
Transformer/
reactor
Check for unusual odor and abnormal increase of 
whining sound.
Stop the equipment and 
contact the manufacturer.
Terminal block
Check for a damage.
Stop the equipment and 
contact the manufacturer.
Smoothing 
aluminum 
electrolytic
capacitor
(1) Check for liquid leakage.
Contact the manufacturer.
(2) Check for safety valve projection and bulge.
Contact the manufacturer.
(3) Judge by visual check 
Relay/contactor
Check that the operation is normal and no 
chattering sound is heard.
Contact the manufacturer.
Control 
circuit,
protective 
circuit
Operation check
(1) Check that the output voltages across phases 
are balanced while operating the inverter alone.
Contact the manufacturer.
(2) Check that no fault is found in protective and 
display circuits in a sequence protective 
operation test.
Contact the manufacturer.
Com
ponent
s c
heck
Overall
(1) Check for unusual odor and discoloration.
Stop the equipment and 
contact the manufacturer.
(2) Check for serious rust development.
Contact the manufacturer.
Aluminum 
electrolytic
capacitor
(1) Check for liquid leakage in a capacitor and 
deformation trace.
Contact the manufacturer.
(2) Visual check and judge by the life check of the 
control circuit capacitor. (Refer to the FR-A800 
Instruction Manual (Detailed)).
Cooling 
system
Cooling fan
(1) Check for unusual vibration and noise.
Replace the fan.
(2) Check for loose screws and bolts.
Fix with the fan cover 
fixing screws
(3) Check for stain.
Clean.
Heatsink
(1) Check for clogging.
Clean.
(2) Check for stain.
Clean.
Display
Indication
(1) Check that display is normal.
Contact the manufacturer.
(2) Check for stain.
Clean.
Meter
Check that reading is normal.
Stop the equipment and 
contact the manufacturer.
Load
motor
Operation check
Check for vibration and abnormal increase in 
operation noise.
Stop the equipment and 
contact the manufacturer.