7 Maintenance
BA8230 167
7.1 Battery for RAM and clock The lithium battery G4 mounted on control board A10 in the 8230 frequency inverter is
provided to operate the clock and the RAM when the supply voltage is off. If the
operating voltage or the supply to the electronics is off for a long period, the battery
will become exhausted.
With longer interruptions, of more than 5 months with the supply voltage or the supply
to the control electronics switched off, the battery must be replaced every 18 months.
With a duty cycle of >60 % and a continuous supply to the control electronics the
battery is to be replaced every 4 years.
7.1.1 Battery change Switch off the supply voltage or the supply to the control electronics before changing
the battery and remove the battery plug X13. Do not switch the control electronics on
yet. Remove the battery from its holder and fit the new battery. While the battery is
being replaced the information is retained in a buffer powered by contactors. This
buffer period must be less than 60 minutes. Record the replacement date on the new
battery and below the unit rating plate.
7.1.2 Technical data of Ref. No.: 029.131 768
battery Type: Lithium primary cell, Mignon casing
Rated voltage: 3.5 V
Capacity: 1800 mAh
Dimensions: ∅ 14,7 x 52 mm
Disposal: As special waste material or return
to manufacturer
Storage capacity: Typically 10 years
Storage and operating temperature: - 55 °C to + 70 °C
7.2 Fans To maintain 8230 frequency inverter availability the fans should be replaced at the
latest after 40,000 hours operation. Contact Lenze for new fans.
The ventilation slots on the 8230 frequency inverter may become blocked if the
cooling air is dirty. They are to be checked at regular intervals, particularly when
through-mounting is used, and must be cleaned if necessary.
7.3 Power connections The screw connections for the mains and motor power cables should be tightened at
the specified torque levels at regular intervals, max. after 40,000 operating hours.
Terminal and plug connections inside the unit are also to be inspected at the above
intervals. The connections are to be secured if they are not seated correctly.
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