Great Wall hover - Direct Addition Method; Vacuum Suction Method; Volume of Refrigeration Oil Addition and Its Methods

CD Player and Air Conditioning System-13
1. CC6460K air conditioning system is designed with SD7V16 compressor, whose refrigeration oil type as
specified is SP-10PAG; hence application of other type of refrigeration oil may damage the parts and compo
nents of the compressor. When the
air conditioning system goes through maintenance and replacement of
parts, it should be added with new refrigeration oil, whose volume is listed as follows: the evaporator and
condenser: 30ml; the drier: 20ml; the pipeline: 10ml.
Addition of refrigeration oil can be available with two methods: The direct addition and the vacuum suction
2. Direct addition method
a. remove the oil filler plug and fill with the specified SP-10PAG refrigeration oil.
b. observe through the hole of oil filter plug and rotate front plate of clutch to make the piston connecting rod right position in the
center of the hole of oil filter plug.
c. insert the dipstick along the right side of piston connecting rod till the top of dipstick touches the case of the compresso r
d. pull out the dipstick and examine the graduations (grooves) of refrigeration oil, the readings shall be within the range of 4-6
scales
.
e. screw firmly the oil filter plug with the fastening torque of 14.7± 4.9N
. m
3. Vacuum suction method:
Firstly pump out the refrigerating system to the vacuum of 0.2x105Pa, and then fill with the specified 0.2x10
5
Pa refrigeration oil;
the detailed steps are as follows:
a. switch off the high-pressure manual valve and the auxiliary valve.
b. dismantle the high-pressure side hose from the manifold pressure gauge and insert it into the oil cup
c. open the auxiliary valve and have the refrigeration oil sucked into the refrigerating system from the oil cup.
d. when the refrigeration oil in the oil cup is almost pumped out to the vacuum, then immediately turn off the auxiliary valve
to
prevent the air from being sucked into the system
.
e. secure the hose adapter at high-pressure side to the manifold pressure gauge, start the vacuum pump and turn on the high-
pressure manual valve, then turn on the auxiliary valve to pump the system to the vacuum state of 0.2x10
5
Pa, keep such state
for 15mins so as to discharge out the air flowing into the system along with the oil.
Volume of Refrigeration Oil Addition and its Methods
2.air heating system
T rouble Causes of the trouble
Heating not supplied or
not sufficiently supplied
1. blower of air conditioner failure 2. relay of the blower damage
d
3. heating water pipe blocked 4. cooling water pipe blocked
5. cold/hot damper executor damaged 6. ins
ufficient cooling liquid
No rotation of blower
1. fuse burned
down or poor contact of the switch
2. motor of the blower burned dow
n
3. open circuit of high-speed relay of the blower
4. speed-adjusting module damaged
5. short circuit
leakage of water Water pipe of air heating aged, insecure joint
Overheat
1. speed-adjusting resistor of the fan damaged
2. cold/hot damper executor damage
d
Insufficient hot air
volume for defrostin
g
1. mode executor damaged
2. falling off of the drive rod
3. damper not in positio
n
4. air vent blocked
5. inadequate heating s
upply
6. inst
allation of wind tunnel not fit
7. circuit disconnecte
d