8
-2
Maintenance and Inspection
The FSDrive-MV1S series Inverter is configured with many parts, and these parts must be operating prop-
erly in order to make full use of the Inverter functions. For this reason, it is essential to catch early signs of
any malfunction and take prompt corrective action by periodically inspecting the Inverter. The service life
of Inverter parts is limited even under normal operating conditions. Using them beyond this limitation can
easily cause changes in their characteristics, and malfunctions. Replace them within their service life
cycle, or the Inverter cannot be expected to operate properly with its original characteristics and perfor-
mance.
This chapter describes the maintenance and inspection required to maintain the high-reliability of the
FSDrive-MV1S series Inverter over a long period of time.
Warranty Period
The warranty period of the FSDrive-MV1S series Inverter is explained below.
Warranty Period: This product is guaranteed for twelve months after being delivered to Yaskawa’s customer
or, if applicable, eighteen months from the date of shipment from Yaskawa’s factory, whichever comes first.
Daily Inspection
Check the following items while the system is operating.
•
The FSDrive-MV1S series Inverter is a medium-voltage device. Wait 10 minutes after
turning off the medium-voltage primary power supply before opening the front cover of
Power Cell Panel.
Failure to observe this precaution would be extremely hazardous.
•
Before starting inspection or maintenance make sure that the indicator LED
“CHARGE” on the front of Power Cell Panel is unlit and check the power supply. (It is
dangerous to touch the panel immediately after turning off the power since residual
voltage stays in the capacitor.)
•
Maintenance, inspection, and parts replacement must be performed by a technician
who thoroughly understands the structure and circuits of the Inverter.
•
Be certain that tools, etc. are not left in the panels after maintenance, inspection, or
parts replacement.
•
Many devices that are sensitive to static electricity, such as CMOS-IC, are used in the
control board. Take a special care when handling the control board. (Touching the con-
trol board with bare hands can severely damage it.)
Always use an electrostatic shielding bag when handling or inspecting the printed cir-
cuit boards.
•
Use an insulated measuring instrument, such as insulated oscilloscope probe, instead
of simply grounding the instrument. Otherwise, the Inverter or a measuring instrument
may be damaged.
Table 8.1 Daily Inspections
Location
Item
Inspection
Entire system
Ambient tempera-
ture
Check the ambient temperature and humidity and check for dust, harmful gas,
and oil mist.
Entire FSDrive-
MV1S
Check for abnormal vibration and noise.
Power supply volt-
age
Check the main circuit voltage and control circuit voltage.
Main circuit
Transformer
Check for abnormal smells and humming.
Cooling system
Cooling fan
Check for abnormal vibration or noise.
Clean the air filter.
Indicators
Indicator lamps
Check for burnt-out lamps.
Meters
Confirm the correct measurement and indication.
WARNING
CAUTION
