Beware, batteries may become discharged
Even when using an external power supply (e.g. power
supply unit), the batteries may self-discharge slightly.
It takes about two years for the batteries to become flat.
Charging the NiCd battery pack
The ambient temperature must be between 0 and 35 °C
when charging the batteries!
When using an external power supply:
1 The green LED »DC power available« lights up
regardless of whether the ventilator is switched on or
off. The internal NiCd battery pack is being charged.
● Display when ventilator is switched off:
● It takes about eight hours to recharge a completely
flat NiCd battery pack.
● Display when ventilator is switched off:
The ventilator can operate for approx. 6 hours at room
temperature when the internal NiCd batteries are fully
charged.
● The following display appears at the end of the
electrical operation time:
Operation will continue for about 10 minutes.
The electrical operation time may be reduced by low
ambient temperatures and the condition of the
rechargeable batteries, see "Technical data", page 43.
D
1
Preparation
Connecting power supply
24
Stand-by
NiCd charging
Stand-by
NiCd charged
Charge NiCd
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