Skoda Citigo 2012 Workshop Manual page 80

Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
Possible deviation from the specified value
• High pressure increases only slightly
above the pressure while engine is not
running,
• Low pressure drops only slightly,
• The required cooling capacity is not
reached.
Possible deviation from the specified value
• High pressure increases above the
specified value,
• Low pressure drops quickly to diagram
value or lower,
• The required cooling capacity is not
reached.
• High pressure and low pressure is nor‐
mal at first, after a certain period of time:
– the high pressure increases above the
specified value,
– the low pressure drops to diagram value
or lower,
– the required cooling capacity is no lon‐
ger reached.
• High pressure and low pressure is nor‐
mal at first.
• After a longer operating time, the low
pressure drops remarkably low (evapo‐
rator ices up).
76
Rep. gr.00 - Technical data
Possible cause of fault
AC compressor defective.
Possible cause of fault
Constriction or blockage in the
refrigerant circuit.
Humidity in the refrigerant cir‐
cuit.
Rectifying fault
– Clean the refrigerant circuit.
⇒ "7 Removing contami‐
nants from the refrigerant
circuit", page 52
– Replace AC compressor.
Rectifying fault
– Feel the temperature gradi‐
ent of the refrigerant circuit
with the hand.
• A temperature gradient is
noticed on a component:
– In case a hose line or a pipe
is bent or constricted, re‐
place this component.
– In case of a blockage, clean
the refrigerant circuit
⇒ "7 Removing contami‐
nants from the refrigerant
circuit", page 52 .
• If no fault is found:
– Clean the refrigerant circuit
⇒ "7 Removing contami‐
nants from the refrigerant
circuit", page 52 .
– Check catch pan (with des‐
sicator) and throttle and re‐
place if necessary, then
evacuate the refrigerant cir‐
cuit for at least 3 hours (see
notes).
– Clean the refrigerant circuit
⇒ "7 Removing contami‐
nants from the refrigerant
circuit", page 52 .