Great Wall Florid, Service Manual

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GWFLORID Maintenance Manual 212
High pressure
side pressure
(MPa)
Appropriate
pressure
Appropriate
charge
Excessive
charge
Refrigerant charge (g)
5. When charging the refrigerant, carefully observe the
high pressure side of the manifold pressure gauge as
well as the refrigerant's rate of flow (limpid, foamy, hazy)
which can all be seen from the inspection window. Use
this window to determine the appropriate time to stop
charging the refrigerant (by closing the low pressure
valve).
When the compressor is operating, please do not close the
high pressure valve.
Before inspecting the cooling level, confirm the regulated
refrigerant charge quantity for the air conditioning system.
Determine the charge amount for the refrigerant charge.
Please carry out the setup according to the following
working conditions.
Engine's water tank temperature: steady
Engine speed: normal idle
A/C switch: ON
Blower speed control switch: highest gear
Temperature controller: inner circulation
Door: completely open
Window: completely open
Filling Quantity and Method for Refrigerant Oil
First vacuum the refrigerant system to 0.2 × 10
-5
Pa, then fill it with model number RS20 refrigerant. The steps
are as follows:
1. Close the high pressure, manually operated valve and the auxiliary valve.
2. Remove the high pressure side's hose from the manifold pressure gauge and insert it into the oil cup.
3. Open the auxiliary valve and draw the refrigerant from the oil cup to the refrigeration system.
4. When refrigerant in the oil cup is about to be fully vacuumed, immediately close the auxiliary valve, in
order to avoid sucking air into the system.
5. Screw the high pressure side hose connector onto the manifold pressure gauge, start the vacuum
pump and open the high pressure, manually operated valve, then open the auxiliary valve to vacuum
the system until it reaches 0.2 × 10
-5
Pa, and continue to vacuum for 15 minutes to exhaust the air
which is entering the system following the oil.
Caution: When replacing an old compressor with a new one, be sure to bleed out some oil in order to
level off the new and the old compressor's oil level, and to avoid an excessive oil amount influencing
the cooling effect. When using an old or repaired compressor, be sure to keep the refrigerant inside
the compressor the same level as the one that is being replaced.
Daily Maintenance of the Air Conditioning System
In order to guarantee the air conditioning system's normal operation, regular maintenance should be performed.
Daily maintenance for the air conditioning system is as follows:
1. Inspect and clean the air conditioning system's condenser. The cooling fin's insides need to be
cleaned, with no blockage in between. After driving in the rain or on a muddy road, check the
condenser fan for silt or rocks. If any are found, immediately clean them up.
2. Inspect the refrigeration system's refrigerant amount: When the air conditioning unit is operating
normally, observe the oil check glass. Under normal conditions, the oil check glass should have no air
bubbles.
3. Inspect the drive belt. The belt between the compressor and the decoration cover should be tight.
4. Check the air conditioning system to make sure there is no irregular noise or unusual odors.
5. Check the compressor's inlet and exhaust port areas to make sure the temperature is normal.
6. Check to make sure the appearance of the refrigeration system's hose is correct and that all the
connections are firm.
7. Inspect if the refrigeration system's pipelines run into other components, and any traces of leaking oil
at each connection.
8. Check and make sure the refrigeration system's circuit connector is firm, and any sign of circuit
disconnection.
9. Inspect if the compressor's fastening bolts are sturdy, reliable or flawed.
the refrigerant into the refrigeration system in the gas
form), and open the manifold pressure gauge's low
pressure valve.