Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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Inspection item
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
155
7
7.1.3
Daily and periodic inspection
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) Visual check and judge by the life check of
the main circuit capacitor. (Refer to page
158 .)

Relay/contactor
Check that the operation is normal and no
chattering sound is heard.

Contact the
manufacturer.
Control
circuit
protection
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.
Comp
on
en
ts
c
he
ck 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 page
158 .)

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.
Heat sink
(1) Check for clogging.  Clean.
(2) Check for stain.  Clean.