5-3 Maintenance and Inspection
Daily Inspection
While the system is operating, check the following items:
•Check the motor for noise.
•Check for abnormal heating.
•Check if the ambient temperature is too high.
•Check if the output current monitor display indicates a higher value than usual.
Regular Maintenance
Check the items below during regular maintenance.
Before starting inspection, always turn the power off, then wait at least one minute after
all indicators on the front panel go off. Touching terminals immediately after turning the
power off may cause an electrical shock.
•Check the terminal block screws for looseness.
•Check if electrically conductive dust or oil mist adheres to the terminal block.
•Check the Inverter set screws for looseness.
•Check if dust or dirt builds up on the heat sink (aluminum portion on the rear of the
Unit).
•Check if dust builds up in the air vents.
•Check if the appearance is normal.
•Check if the cooling fan for the control panel operates normally. (Check for noise or
abnormal vibration, and also check if the total hours of operation has exceeded the
value shown in the specifications.)
Regular Parts Maintenance
AnInverterconsistsofmany differentparts.Itcanprovideits full performance only when
thesepartsoperate normally. Someelectronic partsrequire maintenance depending on
the service conditions. To allow the Inverter to operate normally over an extended peri-
od of time, always perform regular inspection and parts replacement according to the
service life of each part.
Regular inspection intervals vary according to the Inverter installation environment and
service conditions.
The maintenance interval for this Inverter is shown below. Use this information as a
guide to regular maintenance.
Chapter 5
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