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Electrics / General system
A010 - electronic thermostat
E
Testing
18.07.2001
9000
000129
E
a
1/2
Capitel
Docu-No.
Index
Date
Version
Page
A010 - electronic thermostat
Text-module
Text-module
Note:
All re/- 10%
B045 and B046 are N egative T emperature C oefficient sensors,
in other words, the sensor resistance decreases with increasing ambient temperature.
Text-module
The A010 - electronic thermostat switches as a function of:
Bullet-List
●
S037 - fan switch ( A010
supply )
●
S044 - AC potentiometer ( setpoint )
●
B046 - temp. sensor 1 in air current ( actual value )
●
B045 - temp. sensor 2 on evaporator ( safeguard against system icing up )
●
S035 - high-pressure/low-pressure switch ( coolant circuit protection )
Voltage (12 VDC to 14 VDC) to Y024 - magnetic clutch (air-conditioning compressor switches
on)
Text-module
Pin
Colour
Function
1
Brown
Earth
2
-
Not assigned
3
Red
S037 (+UB)
4
Black/yellow
Y024 (+UB)
5
Blue
B045 - sensor
6
Brown
B045 - sensor
7
White
B046 - sensor
8
White
B046 - sensor
9
Brown/yellow
S044 - potentio-
meter
10
Brown/yellow
S044 - potentio-
meter
Pin
Pin description
Condition
Signal
1
Earth
2
Not assigned
3
S037 - fan switch
Ignition ON
Fan switch ON
12 VDC to 14 VDC
Fan switch OFF
0 VDC
4
Y024 - magnetic clutch
Ignition ON
A010 switches on
12 VDC to 14 VDC
A010 switches off
0 VDC
5
B045 - temp. sensor 2
Disconnect A010
approx. 1.18 kOhm
6
at 20
°
C
7
B046 - temp. sensor 1
Disconnect A010
approx. 10 kOhm
8
at 20
°
C
9
S044 - AC potentiometer
Disconnect A010
10
Max. position
approx. 60 ohms
Min. position
approx. 10.4 kOhm
