Hitachi J300U Series Daily Inspection and Periodic Inspection 3/3, Replacement, No blown out LEDs

Daily Inspection and Periodic Inspection (3/3)

Inspection	Inspection item	Inspection content	Inspection cycle	Inspection method	Criteria	Standard	Instruments
						replacement
location
			Regularly Periodic			period
Control	Operation check	(1) Check the balance of the		(1) Measure the	(1) Within 2% voltage	__	___
circuit		output voltage of		voltage between	difference between
		individual phases when		the phases of	phases.
		operating the inverter		inverter output
		independently.		terminals U, V,
				and W.
		(2) Conduct a sequence		(2) Simulate	(2) Operate without any
		protection operation test,		operation of the	abnormalities.
		and make sure that there		inverter protect-
		are no errors in the protec-		ion circuit.
		tion and display circuits.

10-	Compo-	Overall	(1)	No abnormal odor or	Visual inspection	No abnormalities	___	___
	nent			changes in color.
	check,
5
	including		(2)	No significant corrosion.
	printed-
	circuit							___
	boards	Capacitor	No fluid leakage or		Visual inspection	No abnormalities	5 years
			deformation.				(Note 1)
Display	Digital operation		(1)	No illegible display	Visual inspection	Normal operation	7 years	___
	panel

(2) No lack of character Display can be read out.

(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.