Hitachi J300U Series 10-3, Daily Inspection and Periodic Inspection 1/3, Instruments

10-3

Daily Inspection and Periodic Inspection (1/3)

Inspection	Inspection item	Inspection content	Inspection cycle		Inspection method	Criteria	Standard	Instruments
							replacement
location
			Daily	Periodic			period
Overall	Ambient	Check ambient temperature,				Ambient temperature	__	Thermometer
	environment	humidity, dust, corrosive				between -10 to +50˚C;
		gases, oil mist, etc.				no icing.
						Ambient humidity 20 to
						90%; no dew condensation.
	Devices overall	Check for abnormal			Visual and aural			Hygrometer
		vibrations and noise.			inspection.
	Power supply	Check the input line voltage.			Measure the voltage	No abnormalities.		Tester
	voltage				between inverter	200 to 220 V, 50 Hz
					terminals R(L1),	200 to 230 V, 60 Hz
					S(L2) and T(L3).	380 to 415 V, 50 Hz
						400 to 460 V, 60 Hz
Main	Overall	(1) Insulation resistance test			(1) Increase tighting	No abnormalities in (1) and	__	500 V class
circuit		(between main circuit			Making a check	(2).		Megohm meter
		terminals and grounding			on the terque is	Tightening torque (kgf.cm)
		terminal)			needed for the
					increase tighten-	• M3: 8 - 10
		(2) Check installation for			ing of the modules	• M4: 12 - 15
		looseness.			such as a power	• M5: 20 - 25
					module, diode	• M6: 25 - 30
		(3) Check for evidence of			module. Do not	• M8: 100 - 135
		overheating in the various			execute increse	• M10: 150 - 200
		components.			tightening with	Tightening torque for IPM
					no torque gauge
		(4) Clean.			prepared.	and Diode modules
						(kgf.cm)
					(2) Tighten.	• M4: 10-15
						• M5: 15-20
					(3) Visual	• M6: 20-25
					inspection.