NVF5 Series User Manual Chapter 8 Maintenance
Discriminant criteria: Whether there is liquid leakage, whether the safety valve has
projected, measurement of the electrostatic capacitance and insulation resistance.
3
．
Relay
Possible damaged reason: Corrosion, frequent action.
。
Discriminant criteria: Opening and closing failure.
8.6 Storage
After purchasing the inverter, attention must be paid to the following for temporary and
long-term storag
：
1
．
Avoid storing in the hot, humid environment with much dust, metal powder; ensure good
ventilation
；
2
．
The inverters which have been stored for more than 2 years must been done precharge
experiment. When energized, the voltage regulator is used to slowly increase the
voltage to the rated value for nearly five hours without load.
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