Fuji Electric FRENIC-MEGA, Инструкция по эксплуатации

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7-1
Chapter 7 MAINTENANCE AND INSPECTION
Perform daily and periodic inspections to avoid trouble and keep the reliability of the inverter at its maximum. When performing
inspections, follow the instructions given in this chapter.
• Before proceeding to the maintenance/inspection jobs, turn OFF the power and wait at least five minutes for inverters of
40 HP or below, or at least ten minutes for inverters of 50 HP or above . Make sure that the LED monitor and charging
lamp are turned OFF. Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the
terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).
Electric shock may occur.
• Maintenance, inspection, and parts replacement should be made only by authorized persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
• Never modify the inverter.
Electric shock or injuries could occur.
7.1 Daily Inspection
Visually inspect the inverter for operation errors from the outside without removing the covers when the inverter is ON or operating.
- Check that the expected performance (satisfying the standard specification) is obtained.
- Check that the surrounding environment satisfies the requirements given in Chapter 2, Section 2.1 "Operating Environment."
- Check that the LED monitor and LCD monitor on the keypad display normally.
- Check for abnormal noise, odor, or excessive vibration.
- Check for traces of overheat, discoloration and other defects.
7.2 Periodic Inspection
Perform periodic inspections according to the items listed in Table 7.1. Before performing periodic inspections, be sure to stop the
motor and remove the front cover with the inverter power OFF.
Table 7.1 List of Periodic Inspections
Check part Check item How to inspect Evaluation criteria
Environment 1) Check the surrounding temperature,
humidity, vibration and atmosphere (dust,
gas, oil mist, or water drops).
2) Check that tools or other foreign materials
or dangerous objects are not left around the
equipment.
1) Check visually or
measure using apparatus.
2) Visual inspection
1) The standard
specifications must be
satisfied.
2) No foreign or
dangerous objects are
left.
Input voltage Check that the input voltages of the main and
control circuit are correct. Measure the input voltages
using a multimeter or the like. The standard specifications
must be satisfied.
Keypad 1) Check that the display is clear.
2) Check that there is no missing part in the
displayed characters.
1), 2)
Visual
inspection
1), 2)
The display can be read
and there is no fault.
Structure such as
frame and cover Check for:
1) Abnormal noise or excessive vibration
2) Loose bolts (at clamp sections).
3) Deformation and breakage
4) Discoloration caused by overheat
5) Contamination and accumulation of dust or
dirt
1) Visual or auditory
inspection
2) Retighten.
3), 4), 5)
Visual
inspection
1), 2), 3), 4), 5)
No
abnormalities