N700 Operating Instructions and Parts Manual 15. Maintenance and inspection
150
15. MAINTENANCE AND INSPECTION
15.1 Precautions for Maintenance/Inspection
15.1.1 Daily inspection
(1) Check out the followings daily before operation:
① Does the motor operate according to the settings?
② Is there any trouble with the surroundings of the installation?
③ Is there any trouble with the cooling or ventilation system?
④ Is there any abnormal vibration or sound?
⑤ Are their any signs of over-current or discoloration?
⑥ Is their any unusual odor present?
(2) Check the input voltage to the inverter by using a meter during running
① Is the supply voltage constant?
② Are all the phases of the supply balanced?
15.1.2 Cleaning
(1) Make sure that the inverter is not dirty when operating.
(2) If necessary, wipe clean with a soft cloth and synthetic detergent.
(Note) Don't use solvents containing any of the following: acetone, benzene, toluene, alcohol
etc. because they can cause melting of the inverter surface, peeling of paint.
Never clean the display part of the digital operator with detergent on alcohol.
15.1.3 Regular inspection
Inspections should be regularly carried out on the parts that can't be inspected while the inverter is
running.
(1) Is there any trouble with the cooling system? ---- Cleaning of air filter etc.
(2) Check that all screw terminals and fixings are tight as they may loosen due to vibration or
temperature change etc.
(3) Is there any corrosion, damage to insulators?
(4) Measurement of the insulation resistance.
(5) Check of cooling fan, smoothing capacitor, relay and exchange if necessary.
z After a lapse of more than 10 minutes after turning off the input power supply, perform the
maintenance and inspection. Otherwise, there is a danger of electric shock.
After checking the charge lamp of a main frame is off, check again whether a DC voltage
between terminal P, N is below 45V.
z Make sure that only qualified persons will perform maintenance, inspection and part
replacement.
(Before starting the work, remove metallic objects from your person wristwatch, bracelet,
etc.)
(Be sure to use tools protected with insulation)
Otherwise, there is a danger of electric shock and/or injury.
To Next Page
Loading...
Need help?
General