Maintenance and Inspection

L100 Inverter

6–9

Monthly and Yearly Inspection Chart

			Inspection		Inspection
Item Inspected		Check for...	Cycle		Inspection	Criteria
Item Inspected		Check for...			Method	Criteria
			Month	Year	Method
			Month	Year


Overall	Ambient	Extreme	✔		Thermometer,	Ambient temperature
	environment	temperatures			hygrometer	between -10 to 40°C,
		& humidity				non-condensing

	Major devices	Abnormal	✔		Visual and aural	Stable environment for
		vibration,				electronic controls
		noise

	Power supply	Voltage	✔		Digital volt meter,	200V class:
	voltage	tolerance			measure between	200 to 240V 50/60 Hz
					inverter terminals	400V class:
					L1, L2, L3	380 to 460V 50/60 Hz

Main	Ground	Adequate		✔	Digital volt meter,	5 Meg. Ohms or greater
circuit	Insulation	resistance			GND to terminals

	Mounting	No loose		✔	Torque wrench	M3: 0.5 – 0.6 Nm
		screws				M4: 0.98 – 1.3 Nm
						M5: 1.5 – 2.0 Nm

	Components	Overheating		✔	Thermal trip events	No trip events

	Housing	Dirt, dust		✔	Visual	Vacuum dust and dirt

	Terminal block	Secure		✔	Visual	No abnormalities
		connections

	Smoothing	Leaking,	✔		Visual	No abnormalities
	capacitor	swelling

	Relay(s)	Chattering		✔	Aural	Single click when
						switching On or Off

	Resistors	Cracks or		✔	Visual	Use Ohm meter to
		discoloring				check braking resistors

	Cooling fan	Noise	✔		Power down,	Rotation must be
					manually rotate	smooth

		Dust	✔		Visual	Vacuum to clean

Control	Overall	No odor,		✔	Visual	No abnormalities
circuit		discoloring,
		corrosion

	Capacitor	No leaks or	✔		Visual	Undistorted appearance
		deformation

Display	LEDs	Legibility	✔		Visual	All LED segments work

Troubleshooting and Maintenance

Note 1: The life of a capacitor is affected by the ambient temperature. See the Capacitor Life Curve on the next page.

Note 2: The inverter must be cleaned periodically. If dust accumulates on the fan and heat sink, it can cause overheating of the inverter.

L100 specifications

The Hitachi L100 series is a versatile range of variable frequency drives (VFDs) designed to enhance performance in various industrial applications. Known for their reliability and efficiency, these drives are widely used in motors for pumps, fans, compressors, and conveyors.

One of the main features of the Hitachi L100 is its impressive control capabilities. The drive supports both scalar and vector control modes, allowing for precise speed and torque management. This flexibility ensures optimal motor performance across different load conditions. Additionally, the L100 series offers an impressive speed range, which can accommodate a wide variety of applications, from low-speed to high-speed requirements.

The L100 is equipped with built-in functionality for energy saving. By utilizing advanced control algorithms and auto-tuning features, the drive optimizes energy consumption, reducing operational costs and contributing to improved overall system efficiency. The energy-saving mode is particularly beneficial in applications where load conditions frequently change.

Another hallmark of the Hitachi L100 is its robust communication capabilities. The drive supports various communication protocols including Modbus and Ethernet, making it easy to integrate into existing control systems. This connectivity allows for real-time monitoring and diagnostics, which aids in predictive maintenance and minimizes downtime.

In terms of user-friendliness, the L100 series includes a clear, intuitive keypad that simplifies programming and operation. The drive also features a wide range of customizable parameters, enabling users to easily tailor the settings to suit specific application requirements. Additionally, the inclusion of a customizable PID controller allows users to refine process control automatically.

Safety is a priority in the design of the Hitachi L100. The drive comes with various built-in safety features such as overvoltage, overload, and short-circuit protection, ensuring reliable operation in challenging environments. Furthermore, it complies with global safety standards, making it suitable for international applications.

Lastly, the L100's compact design ensures easy installation and minimizes the space required in control cabinets. This is especially advantageous in facilities where space is at a premium. Overall, the Hitachi L100 series represents a combination of advanced technology, user-friendly features, and reliable performance, making it a popular choice for industrial automation solutions.

Hitachi L100 instruction manual Maintenance and Inspection, Monthly and Yearly Inspection Chart

Models: L100

L100 Inverter