Evacuate The Refrigerant Circuit With The A/C Service Station; Evacuate The Refrigerant Circuit With The A/C Service Sta- Tion - Skoda Citigo 2012 Workshop Manual

Note
It cannot be excluded that some refrigerant oil is suctioned out
♦
of the refrigerant circuit together with the refrigerant. In order
to ensure the lubrication of the AC compressor, the refrigerant
oil volume in the circuit must be topped up with fresh oil ⇒
Heating, Air Conditioning; Rep. gr. 87 .
On vehicles with an AC compressor without magnetic coupling
♦
(with regulating valve for compressor of air conditioning sys‐
tem - N280- ) the engine should run with an empty refrigerant
circuit for a relatively short period of time (max. 10 minutes),
thus a high engine speed must be avoided (the AC compres‐
sor keeps on running), see
⇒ "1.15.3 Additional work on vehicles with AC compressor
without magnetic coupling ", page 15
On vehicles with an AC compressor with magnetic coupling,
♦
the air conditioner pressure switch - F129- or the high pressure
sender - G65- switches off the magnetic coupling as soon as
the refrigerant is in the refrigerant circuit.
The engine must only be started if the refrigerant circuit is cor‐
♦
rectly assembled.
5.4 Evacuate the refrigerant circuit with the
A/C service station.
• Before the refrigerant circuit is filled with refrigerant, it must be
evacuated. In addition, humidity is drawn from the circuit.
• Depending on the type of the selected A/C service station,
variations can occur in the work procedure.
• The work procedure must always be carried out as described
in the operating instructions of the selected A/C service sta‐
tion.
Caution
♦ When evacuating and if vacuum is present in the refriger‐
ant circuit, the engine must not be started.
♦ If the engine is started when vacuum is present in the re‐
frigerant circuit, the A/C compressor can be damaged.
Evacuating:
– Connect the A/C service station to the service connections
according to the relevant operating instructions (see refriger‐
ant circuit specifically designed for vehicles) and operate it.
If the vacuum in the system does not remain when evacuating
(see instructions), the following must be done:
– Pour 100 g of refrigerant into the refrigerant circuit, use a leak
detector to detect leaks and eliminate them.
– Evacuate the refrigerant circuit once again.
Note
Only if the vacuum stays steady, the refrigerant circuit can be fil‐
led.
Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
.
5. Working with the A/C service station
39