GMC 1986 P-Truck Service Manual page 77

1B-14 AIR CONDITIONING
Refrigerant Charge 1.474 kg (3 lbs., 4 oz.)
Temperature of
Air Entering 21 °C - (70° F)
Condenser
Engine rpm
Compressor
758 kPa (110 psi)
Head Pressure*
827 kPa (120 psi)
Suction
43 kPa (6 psi)
Pressure psi*
Discharge Air 14° C - (40° F)
Temperature* 23° C -
* Just before compressor clutch disengagement.
INSUFFICIENT COOLING DIAGNOSIS CHART (Cont.)
DASH MOUNTED UNIT (MOTOR HOME CHASSIS UNITS)
DASH MOUNTED UNIT (MOTOR HOME CHASSIS)
27° C - (80° F)
1 1031 kPa (160 psi)
931 Kpa (135 psi)
1 000 kPa (145 psi) 1 172 kPa (170 psi)
48 kPa (7 psi)
C
16° - (41° F)
(45° F) 25° C - (46° F)
Figure 15—Insufficient Cooling Diagnosis Chart (Cont.)
32° C - (90° F) 38° C - (100° F)
2000
1 310 kPa (190 psi)
1 379 kPa (200 psi)
62 kPa (9 psi) 69 kPa (10 psi)
16° C - (41° F) 18° C - (42° F)
25° C - (46° F) 27° C - (47° F)
C
43° (110° F)
1 517 kPa (220 psi) 1 792 kPa (260 psi)
1 586 kPa (230 psi) 1 862 kPa (200 psi)
69 kPa (10 psi) 90 kPa (13 psi)
C 22° C - (44° F)
22° - (44° F)
C -
31° - (49° F) 31° C (49° F)
w
f 2b
F-00468