Maintenance And Inspection; Daily Inspection; Periodic Inspection - IMO VXSM75-1 Instruction Manual

8. Maintenance and
Inspection
Perform daily and periodic inspection to avoid
problems and ensure reliable operation for a
long time. Take care of the following items
during work.
8-1

Daily Inspection

Visually inspect errors in the state of operation
from the outside without removing covers while
the inverter operates or while it is turned on.
1) Check if the expected performance
(satisfying the standard specification) is
obtained.
2) Check if the surrounding environment
satisfies the standard specification.
3) Check that the display of the keypad panel
is free from errors.
4) Check for abnormal noise, excessive
vibration or burning smell.
5) Check for traces of overheat, discoloration
and other defects.
Check part Check item
Environment 1) Check the ambient temperature,
humidity, vibration and atmosphere
(dust, gas, oil mist, water drops).
2) Check if tools or other foreign
matter or dangerous objects are left
around the equipment.
Voltage Check if the voltages of the main
circuit and control circuit are correct.
Keypad 1) Check if the display is clear.
panel 2) Check if there is missing parts
in the characters.
Structure 1) Abnormal noise and excessive
such as vibration
frame 2) Loose bolts (tightened parts)
and cover 3) Deformation and breakage
4) Discoloration and deformation
caused by overheat
5) Stains and dust
Table 8-2-1 List of periodic inspection

Maintenance and Inspection

8-2

Periodic Inspection

After stopping the operation, turn the power off
and remove the front cover to perform periodic
inspection.
The smoothing capacitor at the DC section of
the main circuit takes time to be discharged
after the power is turned off. After checking that
the charge lamp (CRG) is unlit, check that the
DC voltage is lower than the safety level (25
VDC) using a multimeter or the like before
starting work.
WARNING
• Turn the power off and wait for at
least five minutes before starting
inspection. (Further, check that the charge
lamp is unlit and measure the DC voltage
across the P (+) and N (-) terminals to check
that it is lower than 25V.)
Otherwise electric shock could occur.
• Maintenance and inspection and parts
replacement should be made only by
appointed persons. (Take off watch, rings
and other metallic matter before starting
work.) (Use insulated tools.)
• Never modify product.
Otherwise electric shock or injuries
could occur.
How to inspect
1)Check visually or
measure using
apparatus.
2) Visual inspection
Measure using a
multimeter or the like.
1), 2) Visual inspection
1)Visual or hearing
inspection
2) Retighten
3), 4), 5) Visual
inspection
Evaluation criteria
1) The standard
specification must be
satisfied.
2) No foreign or
dangerous objects are
left
The standard
specification must
be satisfied.
1, 2) The display can
be read and there is
no fault.
1),2),3),4),5)
No abnormalities
8-1