Fuji Electric frenic-hvac Instruction Manual page 31

Check part Check item
Terminal
Check that the terminal blocks are not
blocks damaged.
1) Check for electrolyte leakage,
DC link bus
discoloration, cracks and swelling
capacitor
of the casing.
2) Check that the safety valve does
not protrude remarkably.
3) Measure the capacitance if
necessary.
Transformer Check for abnormal roaring noise and
odor.
and reactor
1) Check for chatters during
Magnetic
operation.
contactor
and relay 2) Check that contact surface is not
rough.
1) Check for loose screws and
Printed
connectors.
circuit board
2) Check for odor and discoloration.
3) Check for cracks, breakage,
deformation and remarkable rust.
4) Check the capacitors for
electrolyte leaks and deformation.
1) Check for abnormal noise and
Cooling fan
excessive vibration.
2) Check for loose bolts.
3) Check for discoloration caused by
overheat.
Check the heat sink, intake and
Ventilation
exhaust ports for clogging and foreign
path
materials.
Remove dust accumulating on the inverter with a vacuum cleaner. If the inverter is stained, wipe it off with a
chemically neutral cloth.
Table 6.1 List of Periodic Inspections (Continued)
How to inspect
Visual inspection
1), 2)
Visual inspection
3) Measure the discharge
time with capacitance
probe.
Auditory, visual, and
olfactory inspection
1) Auditory inspection
2) Visual inspection
1) Retighten.
2) Olfactory and visual
inspection
3), 4)
Visual inspection
1) Auditory and visual
inspection, or turn
manually (be sure to
turn the power OFF).
2) Retighten.
3) Visual inspection
Visual inspection
6-2
Evaluation criteria
No abnormalities
1), 2)
No abnormalities
3) The discharge time
should not be shorter
than the one specified by
the replacement manual.
No abnormalities
1), 2)
No abnormalities
1), 2), 3), 4)
No abnormalities
1) Smooth rotation
2), 3)
No abnormalities
No abnormalities