1.
NOTICE!
Danger of batteries freezing!
Discharged batteries are subject to frost damage and can freeze at −10 °C.
➤ Check battery charge with a specific gravity tester.
➤ Recharge the battery
➤ Clean the battery terminals and wipe with grease.
2. Check the battery charge weekly.
Recharge as necessary.
3. For machine standstill times of several weeks: Remove the battery and store in a frost-free
room.
In extreme cases, the use of heavy-duty cold-start batteries and/or additional batteries is rec‐
ommended.
10.3.8.4 Battery removal and installation
Precondition The machine is switched off.
The machine is installed on level ground,
the machine has cooled down.
Air consumers are disconnected,
the outlet valves are open,
the machine is fully vented, the pressure gauge reads 0 bar!
1. WARNING!
There is danger of batteries bursting!
If a battery is short circuited it will overheat and can burst.
➤ Never short-circuit a battery (e.g. with a hand tool).
➤ Wear gloves and eye protection.
2.
NOTICE!
Excessive voltage produced by the alternator!
Voltage peaks can destroy the alternator regulator and diodes.
➤ The battery serves as a buffer and must not be disconnected while the engine is running.
➤ Carry out work on batteries only with the machine shut down.
3. Open the enclosure.
4. Disconnect the negative cable first, then the positive cable.
5. Unscrew the battery fixing clamp.
6. Replace in the reverse order.
7. Make sure the battery is properly secured.
8. Close the enclosure.
Battery replacement:
If the battery is to be replaced, the new battery should have the same capacity, current rating and
shape as the original battery.
➤ Always replace a battery with one of the same type.
Old batteries are hazardous waste and must be disposed of correctly in accordance with local
environmental protection regulations.
10 Maintenance
10.3 Drive engine maintenance
122
Operating Manual Portable Rotary Screw Compressor
MOBILAIR M27 PE
No.: 9_9548 22 HCE