3. Open the access to the batteries (remove maintenance panels/bonnet and pole caps).
4. Switch off all power consumers.
Connecting the battery jumper cables
1. Clamp the first terminal clamp
3
of the red jumper cable to the positive pole of the engine's
battery.
2. Clamp the second terminal clamp
2
of the red jumper cable to the positive pole of the assisting
vehicle's battery.
DANGER
Explosion hazard!
A spark may ignite an explosive gas mixture.
➤ Do not, under any circumstances, connect the minus terminal of the assisting vehicle to the
negative terminal of the battery in the machine to be started.
This can cause sparks when connecting and disconnecting.
➤ Work carefully.
3. Connect the first pole clamp
4
of the black jumper cable to the engine block or a connected, solid
and unpainted metal component of the engine
5
(as distant as possible to the batteries).
4. Clamp the second terminal clamp
1
of the black jumper cable to the negative pole of the assisting
vehicle's battery.
Starting the engine
1. Switch on the «battery isolating switch».
2. Start the engine of the assisting vehicle and run at high speed.
3. Start the compressor engine.
Upon a successful start, run both engines run for approximately 10 – 15 minutes.
This is important, in particular for fully discharged batteries. They will pick up little current only
in the beginning and have a high internal resistance. Any voltage peaks occurring in the engine
generator in this state can be attentuated only by the batteries of the assisting vehicle. The
engine electronics in particular, of the machine is sensitive to overvoltages and could be dam‐
aged easily.
Disconnecting the battery jumper cables
1. Stop the engine of the assisting vehicle.
2. Disconnect the jumper cables in the reverse order, first negative (-) then positive (+).
3. Place the pole caps.
4. Close the maintenance panels and/or bonnet.
A stop of the compressor engine as soon as the cables are disconnected could indicate major
damage to the alternator or batteries to be repaired by a specialised workshop.
7.9.2 Option ba
Starting up low-temperature equipment
Coolant pre-heating
The engine coolant can be pre-heated to improve cold-starting.
7
Initial Start-up
7.9
Low-temperature operation (winter)
74
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E
Option bb
