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Chapter 2
C - AIR CONDITIONING PRESSURE SAFETY DEVICE
The BSI cuts off the compressor in the event of:
•
•
high pressure (risk of damaging the circuit),
low pressure (probability of a leak).
Detection is performed by a 4 level pressure switch.
To prevent the compressor from being successively engaged, waiting times
are set:
COMPRESSOR CUT-OFF
WAITING TIME
1 minute
1st
cut-off
cut-off
2nd
4 minutes
3rd and subsequent cut-offs
16 minutes
The timer is reset when the engine running information disappears.
D - ENGINE SPEED SAFETY DEVICE
To ensure the compressor is sufficiently protected at high engine speeds, a
request to cut off the compressor is made if the engine speed is above 6250
rpm.
The compressor is authorised to re-engage if the engine speed falls below
5650
rpm. A cut-off time of at least 5 seconds is used.
MULTIPLEXED BSI - XSARA PICASSO AND XSARA – PART 8
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