Hitachi J300 Series Instruction Manual page 86

Inspection
Inspection item
location
Control Operation check (1) Check the balance of the
circuit
(2) Conduct a sequence
Compo- Overall (1) No abnormal odor or
nent
check,
including (2) No significant corrosion.
printed-
circuit
boards
Capacitor No fluid leakage or
deformation.
Display Digital operation (1) No illegible display
panel
(2) No lack of character
(3) No blown out LEDs
Note 1. The life of the capacitor is affected by the ambient temperature. Refer to the ambient temperature - capaciitor life curve shown in Appendix 5.
Note 2. The inverter must be cleaned periodically. If dust accumulates on the fan and heat sink, it can cause overheating of the inverter.
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Daily Inspection and Periodic Inspection (3/3)
Inspection cycle
Inspection content
Regularly Periodic
output voltage of
individual phases when
operating the inverter
independently.
protection operation test,
and make sure that there
are no errors in the protec-
tion and display circuits.
changes in color.
Inspection method Criteria
(1) Measure the (1) Within 2% voltage
voltage between difference between
the phases of phases.
inverter output
terminals U, V,
and W.
(2) Simulate (2) Operate without any
operation of the abnormalities.
inverter protect-
ion circuit.
Visual inspection No abnormalities
No abnormalities
Visual inspection
Visual inspection Normal operation
Display can be read out.
Standard
Instruments
replacement
period
__ ___
___ ___
___
5 years
(Note 1)
___
7 years