Skoda Citigo 2012 Workshop Manual page 19

Note
Remove contaminants from the refrigerant circuit
⇒ "7 Removing contaminants from the refrigerant circuit",
page 52 .
1.15.3 Additional work on vehicles with AC
compressor without magnetic coupling
Note
The engine must only be started if the refrigerant circuit is cor‐
♦
rectly assembled (A/C compressor operates).
If possible, only start the engine if the refrigerant circuit is filled.
♦
The engine must on no account be started if vacuum is present
♦
in the refrigerant circuit (in case of evacuating with an A/C
service station). This would result in mechanical damage of
the A/C compressor.
If the engine runs with an empty refrigerant circuit (no vacuum
♦
must be present in the circuit), an increase in its revolutions
must be absolutely avoided. There must be at least a quarter
of the refrigerant oil volume present in the AC compressor,
which is prescribed for this refrigerant circuit and the engine
may be run for max. 10 minutes.
So that the AC compressor suffers no damage when the re‐
♦
frigerant circuit is empty, it is fitted with a secured oil supply.
This means that approx. 40 to 50 cm
in the AC compressor.
1.15.4 O-ring seals
These O-rings seal off the connection points between the indi‐
vidual components of the refrigerant circuit.
Only use O-rings that are resistant to refrigerant R134a and re‐
lated refrigerant oils. Original spare parts offer this guarantee.
Black and coloured O-rings are fitted.
O-ring seals:
♦ Only use once, replace.
♦ Pay attention to correct diameter -a- and -b-.
♦ Moisten with refrigerant oil before inserting.
1.15.5 Work procedure before operating the air
conditioning system after a repair
– Turn the A/C compressor on the clutch or the belt pulley of the
magnetic coupling about 10 revolutions by hand.
– Start the engine with the air conditioning system deactivated
( air conditioner magnetic coupling - N25- and regulating valve
for compressor of air conditioning system - N280- are not ac‐
tivated).
– After the idling speed has stabilised, switch on the AC com‐
pressor and operate it for at least 10 minutes at idle speed and
at maximum refrigerating capacity.
Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
3
of refrigerant oil remains
1. General notes on the air conditioning system
15