Checking the battery electrolyte level
The amount of electrolyte is generally sufficient for the lifetime of the battery. Nevertheless, the
electrolyte level should be checked once per year. The electrolyte level should reach up to the
mark, i.e. 0.4 inch above the plates.
Replace the battery immediately if the casing leaks!
1.
Irreparable battery damage!
Topping off with pure electrolyte will increase the level of concentration and can irreparably
damage the battery.
➤ Top off only with distilled water.
2. Check the electrolyte level.
If the electrolyte level does not reach the mark:
➤ Top off with distilled water.
➤ Close the door.
Winter operation
The batteries are particularly stressed in winter. Only a fraction of the normal starting energy is
available at low temperatures.
1.
Danger of batteries freezing!
Discharged batteries are subject to frost damage and can freeze at 14 °F.
➤ Check battery charge condition with an electrolyte density tester.
➤ Recharge the batteries.
➤ 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 batteries and store in a frost-free
environment.
In extreme cases, the use of a heavy-duty cold-start battery and/or an additional booster bat‐
tery is recommended.
10.4.11.4 Battery removal and installation
Precondition The machine is switched off and has cooled down.
The machine is standing level.
Air consumers are disconnected,
the outlet valves are open,
the machine is fully vented, the pressure gauge reads 0 psig.
The «Controller ON/OFF» switch is switched off.
1.
There is danger of batteries bursting!
A short-circuited battery heats up quickly and can burst.
➤ Never short-circuit a battery (e.g. with a hand tool).
➤ Wear protective gloves and safety glasses.
10 Maintenance
10.4 Drive engine maintenance
No.: 902366 10 USE
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M55 PE SIGMA CONTROL SMART pV
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