Mitsubishi Lancer Evolution VI - Refrigerant Charging Amount Check

HEATER AND MANUAL AIR CONDITIONER – On-vehicle Service
55-9
27. Remove the quick joint 2 from the low-pressure service
valve.
28. Remove the service can.
NOTE
If the service can is not emptied completely, keep the
handles of the charging valve and adaptor valve 1 closed
for the next charging.
REFRIGERANT CHARGING AMOUNT CHECK
1. Start the engine.
2. Operate A/C and set the temperature control to MAX
COOL.
3. Fix the engine speed at 1,500 r/min.
4. Check the refrigerant level (bubble generation) through
the sight glass of the receiver.
Item Condition
Proper level Bubbles are generated some times. No
bubbles appear when the engine speed is
slightly increased.
Level too low A large amount of air bubbles are generated. If
it looks milky white, the level is excessively
lowered.
Level too high No air bubbles appear.
5. If the level is too low, add the refrigerant, and if the level
is too high, drain the refrigerant as necessary.
Caution
Be sure to work at the low-pressure side service valve.
Proper level Level too low Level too high
Bubble
Bubble