1-4
1.3 Transportation
• When carrying an inverter, always support its bottom at the front and rear sides with both hands. Do not hold
covers or individual parts only. You may drop the inverter or break it.
1.4 Storage Environment
1.4.1 Temporary storage
Store the inverter in an environment that satisfies the requirements listed in Table 1.1.
Table 1.1 Environmental Requirements for Storage and Transportation
Item Requirements
Storage temperature *
1
-25 to +65°C
A location where the inverter is not subject to abrupt changes in
temperature that would result in the formation of condensation or ice.
Relative humidity 5 to 95% *
2
Atmosphere The inverter must not be exposed to dust, direct sunlight, corrosive or flammable gases,
oil mist, vapor, water drops or vibration. The atmosphere must contain only a low level of
salt. (0.01 mg/cm
2
or less per year)
Atmospheric pressure 86 to 106 kPa (in storage)
70 to 106 kPa (during transportation)
*
1
Assuming a comparatively short storage period (e.g., during transportation or the like).
*
2
Even if the humidity is within the specified requirements, avoid such places where the inverter will be subjected to
sudden changes in temperature that will cause condensation to form.
Precautions for temporary storage
(1) Do not leave the inverter directly on the floor.
(2) If the environment does not satisfy the specified requirements, wrap the inverter in an airtight vinyl sheet or
the like for storage.
(3) If the inverter is to be stored in an environment with a high level of humidity, put a drying agent (such as silica
gel) in the airtight package described in item (2).
1.4.2 Long-term storage
The long-term storage methods for the inverter vary largely according to the environment of the storage site.
General storage methods are described below.
(1) The storage site must satisfy the requirements specified for temporary storage.
However, for storage exceeding three months, the ambient temperature should be within the range from -10
to +30 °C. This is to prevent the electrolytic capacitors in the inverter from deteriorating.
(2) The inverter must be stored in a package that is airtight to protect it from moisture. Include a drying agent
inside the package to maintain the relative humidity inside the package to within 70%.
(3) If the inverter has been installed in the equipment or control board at a construction site where it may be
subjected to humidity, dust or dirt, then remove the inverter and store it in a suitable environment specified in
Table 1.1.
Precautions for storage over 1 year
If the inverter will not be powered on for a long time, the property of the electrolytic capacitors may deteriorate.
Power the inverters on once a year and keep them on for 30 to 60 minutes. Do not connect the inverters to motors
or run the motor.
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