Climate Control - SMART Series 451 Service Manual

SN_Typ 451_us.book Seite 104 Freitag, 30. November 2007 1:56 13

Climate control

Heating
Model series 451 is equipped with a heating system as
standard. The temperature and blower speed are each
set by means of a slide control. The temperature blend
flap in the air distribution box is operated mechani-
cally via a Bowden cable. The air distribution is
adjusted with a 360° rotating button switch. The air
distribution flap is actuated mechanically via a cable
shaft.
The blower can be adjusted in four power stages. The
rpm is regulated by means of an external series
resistor:
• Stage 0: Blower off
• Stage 1: Blower on
Weak, low speed
• Stage 2: Blower on
Strong, higher speed
• Stage 3: Blower on
Stronger, higher speed
• Stage 4: Blower on
Maximum strength
Air outlets for heater and temperature-regulated air conditioning
104 Introduction of the smart fortwo, Model Series 451
The rear window heater button in the heater/AC oper-
ating unit switches on the heated rear window and the
function LED in the button lights up.
The heated rear window is switched off either auto-
matically via a timer control or by pressing the rear
window heater button again. The function LED goes
out. If the on-board power supply voltage is too low,
the rear window heater is switched off automatically.
Temperature-regulated air conditioning
The control functions of air distribution, blower
output, temperature setting and heated rear window
are as described for the heater.
Activation of the air conditioning:
• Press A/C button. The function LED lights up.
Deactivation of the air conditioning:
• Press A/C button. The function LED goes out.
P83.10-2640-00