Skoda Citigo 2012 Workshop Manual page 77

Note
The temperature of the components of the refrigerant circuit
♦
should be equal to the ambient temperature (if individual com‐
ponents of the refrigerant circuit are warmer or colder, the
pressure deviates from the values in the table).
At absolute pressure, 0 bar corresponds to an absolute vac‐
♦
uum. The normal ambient pressure (overpressure) corre‐
sponds to 1 bar absolute pressure. On the scales of most
pressure gauges, 0 bar corresponds to an absolute pressure
of one bar (recognizable by the indication -1 bar below 0).
On vehicles with high pressure sender - G65- , on which the
♦
measured pressure is displayed in the measured value block,
the measured pressure should correspond to the values in the
table.
The measured pressure in the refrigerant circuit is lower than the
pressure indicated in the table:
Too little refrigerant in the circuit.
– Detecting leaks on the refrigerant circuit
⇒ "6 Leak detection on the refrigerant circuit", page 42
– Check pressure relief valve
⇒ "2.1.10 Pressure relief valve", page 21
If the pressure relief valve is drained:
– Check the radiator fan actuation.
– Check coolant pipes and refrigerant hoses for cross-sectional
constrictions, for too small bending radii.
– Check coolant pipes and coolant hoses for external damage.
– If no fault is found, clean refrigerant circuit
⇒ "7 Removing contaminants from the refrigerant circuit", page
52 .
The pressure in the refrigerant circuit corresponds to what is given
in the table or is higher:
– Start the engine.
– Set air conditioning system to maximum refrigerating capacity
⇒ page 72 .
Note
On vehicles with regulating valve for compressor of air condition‐
ing system - N280- , the control current can be read in the
measured value block ⇒ Vehicle diagnostic tester
If the AC compressor is not driven while the engine is running or
the regulating valve is not actuated (compressor specific):
– The cause, for example, can be determined and eliminated by
interrogating the event memory of the air conditioning system
⇒ Vehicle diagnostic tester
– Test the voltage supply for the air conditioner magnetic cou‐
pling - N25- if it is O.K., repair magnetic coupling.
– Check the actuation of the regulating valve for compressor of
air conditioning system - N280- ⇒ Vehicle diagnostic tester
Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
.
9. Check the pressure in the refrigerant circuit (with the A/C service station)
.
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