Degrees* | Suction* | Discharge* | Outlet* |
---|---|---|---|
21°C (70°F) | 131-186 kPa (19-27 psi) | 765-1130 kPa (111-164 psi) | 1-8°C (33-46°F) |
27°C (80°F) | 131-186 kPa (19-27 psi) | 896-1193 kPa (130-173 psi) | 1-9°C (33-49°F) |
33°C (90°F) | 131-186 kPa (19-27 psi) | 1151-1462 kPa (167-212 psi) | 2-9°C (34-49°F) |
38°C (100°F) | 144-193 kPa (21-28 psi) | 1456-1751 kPa (211-254 psi) | 3-10°C (37-51°F) |
43°C (110°F) | 144-193 kPa (21-28 psi) | 1599-1938 kPa (232-281 psi) | 3-10°C (37-51°F) |
Important: Statements contain additional information to help you confirm your diagnosis and lead you to a corrective action. When ALL pressure and temperature readings fall within the ranges of a given chart, use that chart to repair the vehicle.Key: Statements are used to interpret the pressure and temperature readings compared to normal system performance. If testing above or below ambient temperatures listed, rely on key statements to diagnose system. Then: Statements contain additional information to help you confirm your diagnosis and lead you to a corrective action. When all pressure and temperature readings fall within the ranges of a given chart, use that chart to repair the vehicle. *Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* |
---|---|---|---|
21°C (70°F) | 131-186 kPa (19-27 psi) | 765-1130 kPa (111-164 psi) | 1-8°C (33-46°F) |
27°C (80°F) | 131-186 kPa (19-27 psi) | 896-1193 kPa (130-173 psi) | 1-9°C (33-49°F) |
33°C (90°F) | 131-186 kPa (19-27 psi) | 1151-1462 kPa (167-212 psi) | 2-9°C (34-49°F) |
38°C (100°F) | 144-193 kPa (21-28 psi) | 1456-1751 kPa (211-254 psi) | 3-10°C (37-51°F) |
43°C (110°F) | 144-193 kPa (21-28 psi) | 1599-1938 kPa (232-281 psi) | 3-10°C (37-51°F) |
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Important: To ensure accurate pressure and temperature readings make sure the vehicle is properly set up to run the performance test. Refer to vehicle set up section in this manual. ALL TEST PARAMETERS MUST BE FOLLOWED TO OBTAIN ACCURATE READINGS.
Important: Use a refrigerant identifier to verify refrigerant purity. Non-condensable gases or refrigerant substitutes will affect system pressure/temperature readings.
Degrees* | Suction* | Discharge* | Outlet* |
---|---|---|---|
21°C (70°F) | 138-193 kPa (20-28 psi) | 807-1124 kPa (117-163 psi) | 2-9°C (36-48°F) |
27°C (80°F) | 138-193 kPa (20-28 psi) | 1075-1358 kPa (156-197 psi) | 2-10°C (36-50°F) |
33°C (90°F) | 144-193 kPa (21-28 psi) | 1489-1793 kPa (216-260 psi) | 5-12°C (40-53°F) |
38°C (100°F) | 144-193 kPa (21-28 psi) | 1627-1994 kPa (236-289 psi) | 6-13°C (43-55°F) |
43°C (110°F) | 144-200 kPa (21-29 psi) | 1917-2303 kPa (278-334 psi) | 6-14°C (43-56°F) |
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
• | High humidity conditions affect the system performance by increased heat load on the system. This extra heat load will increase the discharge pressure and the outlet temperature. High humidity is defined as a relative humidity higher than 70 percent at 21°C (70°F), 60 percent at 27°C (80°F), 50 percent at 32°C (90°F), 40 percent at 38°C (100°F), and 20 percent at 43°C (110°F). |
• | This chart illustrates the effect the high humidity has on the Saturn VUE air conditioning system. Use this chart to determine the normal system performance under high humidity conditions. |
Degrees* | Suction* | Discharge* | Outlet * | ||||||
---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Normal to High | Low | Slightly Cool to Warm | ||||||
Key: Poor Cooling at Higher Ambients. Then: The system is operating with a low charge.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Normal to Slightly High | High | Cool to Warm | ||||||||
Key: The high pressures cause the pressure sensor to cycle the compressor on and off at high ambient air temperatures Then: The System may be operating in an overcharged condition.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | 483-689 kPa (70-100 psi) | 483-689 kPa (70-100 psi) | 21-43°C (70-110°F) | ||||||||||
Important: Ensure that the manifold gage set valves are closed. Key: No change in the suction and the discharge pressures with the compressor engaged. The gage pressures will be almost equal. Then:
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||
---|---|---|---|---|---|---|---|---|---|
21°C (70°F) | 165-207 kPa (24-30 psi) | 730-1007 kPa (106-146 psi) | 2-8°C (35-47°F) | ||||||
27°C (80°F) | 172-213 kPa (25-31 psi) | 834-1110 kPa (121-161 psi) | 3-9°C (37-49°F) | ||||||
33°C (90°F) | 199-241 kPa (29-35 psi) | 930-1207 kPa (135-175 psi) | 5-9°C (42-49°F) | ||||||
38°C (100°F) | 220-275 kPa (32-40 psi) | 1145-1421 kPa (166-206 psi) | 7-12°C (45-54°F) | ||||||
43°C (110°F) | 220-275 kPa (32-40 psi) | 1158-1434 kPa (168-208 psi) | 7-12°C (45-54°F) | ||||||
Key:
Then: The compressor may be at minimum displacement.
|
Degrees* | Suction* | Discharge* | Outlet* | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Low to Normal | High | Cold | ||||||||||||
Key:
Then: The compressor may be at maximum displacement.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Normal to Slightly High | Normal to Slightly High | Cool to Warm | ||||||||||
Key:
Then: The thermal expansion valve (TXV) may be open.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Low | Low | Cool to Warm | ||||||||||
Key:
Then: The thermal expansion valve (TXV) may be restricted or closed.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |
Degrees* | Suction* | Discharge* | Outlet* | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
21-43°C (70-110°F) | Low | Low | Cool to Warm | ||||||||||
Key:
Then: Confirm the condition by a thorough physical and visual inspection of all lines and components.
*Degrees - If the ambient air temperature is *Suction - and the low side gage should read *Discharge - and the high side gage should read *Outlet - and the right center air temperature should be |