Safety precautions
BU5002R/BU3002R/BU3002RH
21
Notes
When the unit is to be stored, charge it for 8 hours or mo
re, and turn off the “Power”
switch. Recharge within 6 months when stored at a storage temperature of 25°C or
less, and within 2 months when the storage temperature is 40°C or less.
⚫
Self-discharge occurs even when the battery is not used, and if left for a long period of time, the
battery becomes over discharged. This causes the backup time to be shortened, or the battery to
become unusable.
⚫
For long-term storage, it is recommended that the environment is 25°C or lower.
⚫
During storage, turn off the “Power” switch of the unit.
Take care not to cause short circuit between the output lines of this unit, or between
an output line and a ground wire (ground fault).
⚫
There is a risk of a breakdown of the unit.
Do not insert the AC input plug of the unit into the power output receptacle of the
unit during backup operation.
⚫
There is a risk of a breakdown of the unit.
Do not connect a page printer (such as laser printer) to the unit.
⚫
There is a possibility that the connection capacity is exceeded frequently and repeatedly, leading
to the state that the input power supply is output directly (bypass operation).
⚫
The peak current of a page printer is large, and exceeding of the connection capacity may be
detected.
Do not install or store the unit in a place where it is subject to direct sunlight.
⚫
The internal battery may be rapidly degraded by the temperature rise, and it may become
unusable.
Do not conduct a withstanding voltage test.
⚫
A surge absorber is provided on the power supply input cable, and if a withstanding voltage test is
conducted, the surge absorber may be damaged.
⚫
If conducting an insulation resistance test, perform it in the 250 VDC range.
Turn off the “Power” switch of the unit before turning off the commercial power
supply.
⚫
If the commercial power supply is stopped, operation is switched to backup operation. If backup
operation is conducted too frequently, the battery life may be significantly shortened.
Do not use the unit for frequent backup operation.
⚫
The battery will deteriorate and become unable to last for the specified backup time.
If using this unit in combination with a device with large variation in power supply
voltage and frequency, such as generators, perform operation check beforehand.
⚫
If the output voltage or frequency of the generator is outside the input voltage or frequency range
of the unit, operation will switch to backup operation.
⚫
Even when the input frequency is within the range, if there is a sudden change of 5 Hz/sec or
more, operation will switch to backup operation.
