window NISSAN 300ZX 1984 Z31 Heather And Air Conditioner Workshop Manual
[x] Cancel search | Manufacturer: NISSAN, Model Year: 1984, Model line: 300ZX, Model: NISSAN 300ZX 1984 Z31Pages: 38, PDF Size: 1.15 MB
Page 16 of 38
DISCHARGING, EVACUATING, CHARGING AND CHECKING
Checking Refrigerant Level
I
Suitable
CONDITION
Door window
AIC switch
TOO much refrigerant
Open
ON
TEMP lever position Max COLD
FAN lever position Maximum speed
Check sight glass after a lapse of about five
minutes
Check item
Terneralure of high
pressure and
low
pressure lines
Staie !n slght glass
Pressure of system
Repair
Almost no refrigerant
Almost no difference be-
tween high pressure and
low pressure side temperature
Bubbles flow continu
ously Bubbler will disappear and something
like mest will flow when
refrigerant
IS nearly gone
AC256
High Pressure side os ab-
normally low
Stop compressor m.
mediately and conduct an Overall check
iigh pressure side IS warm
Ind low pressure side is
awly cold
-he bubbler are seen
it inieivals of 1 - 2
econds
ACZ57
loth pressure on high
nd low pressure sides are
lighfly low
:heck for gas leakage re-
air as required. replenish Nnd charge system
a. The bubbles seen through the sight glass are
influenced by the ambient temperature. Since
the
bubbles are hard to show up in compara-
tively
low temperatures below 20°C (68°F). it
is possible that a slightly larger amount of re-
frigerant would be filled,
if supplied according
to the sight glass.
Be sure to recheck the
amount when
it exceeds 20°C (68°F). In
iigh pressure ride is hot
ind
low pressure ride 8s
High pressure Side IS ab
normally hot
4Imost transparent
lubblei may appear when ,ngine speed 8s raised and
owered
do dear difference exists between these two condi-
No bubbler can be seen
10"s
AC258
:oth pressures on high
nd
low pressure rides are ormal abnormally hgh
Both pressures on high
and
low pressure rider are
Dmharge refragerant from sewice valve of low
pressure ride
higher temperature the bubbles are easy to
show up.
b. When the screen in the receiver drier is clogged,
the bubbles will appear
even if the amount of
refrigerant
IS normal In this case, the outlet
side pipe of the receiver drier becomes consid-
erably cold.
1
HA-I 6
Page 18 of 38
A/C PERFORMANCE TEST
Performance Chart
Inside air (Recirculating air) at blower assembly inlet
Relative humidity At temperature
% OC (OF)
20 (68)
TEST CONDITION
Testing must be performed as follows
Vehicle location
Doors
Door window
Hood
TEMP lever position
Mode switch position
Recirculation switch position
FAN speed
Engine speed'
Time required before starting
testing after
air conditioner starts operating
Discharge air temperature at center ventilator
'C (OF)
45-50 (40-41)
TEST READING
Recirculating-to-discharge air temperature table
50-60
Indoors or in the shade (in a well ventilated place)
Closed
Open
Open Max
COLD
# (Face)
RECIRC ON
MAX HI
1,500 rpm
More than 10 minutes
-.
86-95 (47-49)
12 7
- 14 1 (55 - 57)
16 7.186
(62 -65)
25 (77)
30 (86)
35 (951
60 - 70
50-55 (41-42)
9 5
- 10 5 (49 - 51)
14
1 - 15 5 (57- 60)
18 6 - 20 5 (65 - 69)
20 (68)
25 (77)
30
(86)
35 (95)
208-231 (69-74)
40 (104) 231 -254174-78)
HA-I 8