Basics For Working On The Refrigerant Circuit - Skoda Citigo 2012 Workshop Manual

Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
1.15 Basics for working on the refrigerant cir‐
cuit
⇒ "1.15.1 General points", page 14
⇒ "1.15.2 Removing contaminants from the refrigerant circuit ",
page 14
⇒ "1.15.3 Additional work on vehicles with AC compressor without
magnetic coupling ", page 15
⇒ "1.15.4 O-ring seals", page 15
⇒ "1.15.5 Work procedure before operating the air conditioning
system after a repair", page 15
1.15.1 General points
♦ Keep the work area and all tools clean.
♦ Wear work clothes, protective goggles and gloves when han‐
dling refrigerant and nitrogen.
♦ Switch on all available exhaust systems in the workshop.
♦ Use an A/C Service position only to empty the refrigerant cir‐
cuit, only then may you open the screwed connections and
replace defective components.
♦ Seal off opened aggregates and hoses immediately with caps
to protect them against humidity and dirt.
♦ Only use tools and materials intended for refrigerant R134a.
♦ Protect the refrigerant oil from humidity by closing opened
cans.
Note
After completing repair works, screw on screw caps on all the
♦
suction-, filler valves and service connections (with gaskets).
Before operating the air conditioning system, observe the ve‐
♦
hicle-specific filling contents.
Do not top up with refrigerant, drain existing refrigerant and
♦
refill the system.
1.15.2 Removing contaminants from the refrig‐
erant circuit
Flush the refrigerant circuit with R134a (if necessary blow
through), if:
– Humidity or dirt has penetrated into the refrigerant circuit (e.g.
after an accident).
– The refrigerant has become dark and thick.
– After an A/C compressor replacement there is too much re‐
frigerant oil in the refrigerant circuit.
– The air conditioning compressor must be replaced because of
internal damage (e.g. it is too laud, jammed or no output).
14
Rep. gr.00 - Technical data