Skoda Citigo 2012 Workshop Manual page 143

Solenoid coil of air conditioning system magnetic coupling - N25-
Note
Valid for vehicles assembled in India.
♦ An overheating fuse is built into the solenoid coil. The over‐
heating fuse will cut out the solenoid coil as soon as (e.g.
because of AC compressor resistance) the magnetic coupling
starts overheating (approx. 180°C)
♦ The solenoid coil also includes a protective diode (reduces
voltage peaks that may occur when disconnecting the mag‐
netic coupling).
High-pressure sender - G65-
The high-pressure sender determines the pressure in the refrig‐
erant circuit and transmits the values to the Air conditioning
system control unit - J301- .
The air conditioning system control unit - J301- switches:
♦ The radiator fan - V7- switches to the next speed in the event
of a pressure rise in the refrigerant circuit
♦ Reduction of the compressor output if the pressure is too high,
3.2 MPa (32 bar), e.g. too little engine cooling
♦ Reduction of the compressor output if the pressure is too low,
0.2 MPa (2 bar), e.g. refrigerant loss
Air conditioning system control unit - J301- (Climatic)
The air conditioning system control unit is integrated in the heat‐
ing and air conditioning system control.
It processes information such as ambient temperature, actual and
required interior temperature, evaporator temperature, pressure
in the refrigerant circuit, engine load and driving conditions.
Depending on the required cooling output the air conditioning
system control unit - J301- sends a PWM signal to the regulating
valve of the AC compressor.
Note
On vehicles fitted with Climatronic, the Climatronic control unit -
J255- takes over these functions.
Air conditioning system control unit - J255- (Climatronic)
Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fabia II 2011 ➤
Heating, Air conditioning - Edition 06.2013
2. Description of the air conditioning system
33