62C - 6
MANUAL AIR CONDITIONING
62C
V2 MR-372-J84-62C000$020.mif
MANUAL AIR CONDITIONING
Fault finding – System operation and track allocation
System operation
The manual heating and ventilation system does not have a computer. It consists solely of a control panel from which
the compressor (controlled by the Protection and Switching Unit and injection), the passenger compartment heating
resistors (controlled by the UCH with permission from the Protection and Switching Unit and injection) and rear de-
icer (managed by the Protection and Switching Unit) are started as explained in the synopsis of heating and
ventilation system operation in Section 62A.
The panel, by means of cables, also controls the air distribution flaps, air distribution and recycling, as well as fan
assembly speed through a connecting wire and resistor unit.
Manual heating and ventilation system control panel track allocation
Control panel
track Allocation Sensor or actuator track
A1 Earth
A2 Passenger compartment ventilation control
speed 1Resistor unit connector A track 1
A3 Passenger compartment ventilation control
speed 2Resistor unit connector A track 2
A4 Passenger compartment ventilation control
speed 3Resistor unit connector A track 3
A5 Passenger compartment ventilation control
speed 4Resistor unit connector A track 4
A6 Not used
B1 Passenger compartment ventilation speed 0
signal UCH
B2 + 12 V side lights Protection and Switching Unit
B3 Rear screen de-icer operation request UCH
B4 Rear screen de-icing control indicator light UCH
B5 Earth
B6 Air conditioning control indicator light UCH
B7 Air conditioning operation request UCH
B8 +12 V accessories Fuse and Relay box
B9 Not used
