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Electrical system 8
B-MC - 12/18-2 - EHG-0016-01EN
109
8 Electrical
system
Chapter overview
This chapter contains instructions regarding the electrical system of the ve-
hicle.
The operation of the electrical appliances of the housing body is described
in chapter 9.
8.1 General safety instructions
Only allow qualified personnel to work on the electrical system.
All
electronic
devices
(e.g. mobile telephones, radios, televisions or
DVD players) which have been retrofitted to the vehicle and are oper-
ated during the journey must have certain features: These are the CE
certification, the EMC inspection (electromagnetic compatibility) and
the "e"
‐
inspection.
Only in this way can the functional reliability of the vehicle be ensured.
Otherwise the airbag may be triggered or interference to the on-board
electronics may result.
After the vehicle is started, delays to the output or forwarding of electri-
cal impulses are possible.
The control unit of the basic vehicle does not release the D+ signal until
the engine has reached full performance. In the event of a cold start in
winter, this can take up to 15 seconds.
For this reason, output of warning signals (such as "entrance step ex-
tended") may sometimes be delayed.
The automatic retraction of a SAT antenna can also be delayed.
During a storm, to protect the electrical devices disconnect the 230 V
connection and retract the antennae.
8.2 Terms
The off-load voltage is the voltage of the battery in idle condition, i. e. no cur-
rent is consumed and the battery is not being charged.
The battery must remain idle for a while before measuring. After charg-
ing the last time, or after the last current has been drained by appli-
ances, wait approximately 2 hours before measuring the off-load volt-
age.
Some electrical appliances, such as the clock and the indicator lamps, re-
quire continuous electric current, for this reason they are referred to as inac-
tive appliances. This closed circuit current flows even if the device has been
switched off.
Off-load voltage
Closed circuit current
Summary of Contents for BMC 550
Page 2: ...Instruction manual 2 B MC 12 18 2 EHG 0016 01EN...
Page 8: ...Checklist before first journey of the vehicle 8 B MC 12 18 2 EHG 0016 01EN...
Page 12: ...1 Introduction 12 B MC 12 18 2 EHG 0016 01EN...
Page 20: ...2 Safety 20 B MC 12 18 2 EHG 0016 01EN...
Page 54: ...4 During the journey 54 B MC 12 18 2 EHG 0016 01EN...
Page 140: ...8 Electrical system 140 B MC 12 18 2 EHG 0016 01EN...
Page 172: ...9 Appliances 172 B MC 12 18 2 EHG 0016 01EN...
Page 186: ...10 Sanitary fittings 186 B MC 12 18 2 EHG 0016 01EN...
Page 202: ...11 Care 202 B MC 12 18 2 EHG 0016 01EN...
Page 224: ...13 Wheels and tyres 224 B MC 12 18 2 EHG 0016 01EN...
Page 240: ...16 Technical data 240 B MC 12 18 2 EHG 0016 01EN...
Page 242: ...17 Instructions for the service partner 242 B MC 12 18 2 EHG 0016 01EN...