Step
| Action
| Yes
| No
|
DEFINITION: The low and the high side pressures are both higher than normal.
| • | Restricted Condenser Air Flow |
| • | Cooling Fan Malfunction |
| • | Expansion Device Malfunction |
|
1
| Were you sent here from the A/C System Performance Test?
| Go to
Step 2
| Go to
Air Conditioning (A/C) System Performance Test
|
2
|
- Start the engine.
- Make sure that the A/C is ON.
- Inspect for proper cooling fan operation. Refer to
Cooling System Description and Operation
.
Are the cooling fans ON and operating properly?
| Go to
Step 3
| Go to
Step 5
|
3
| Visually inspect for the following conditions:
| • | Damaged condenser cooling fins |
| • | Missing or misaligned air baffles |
| • | Restricted front end air flow |
Do any of these conditions exist?
| Go to
Step 4
| Go to
Step 6
|
4
| Repair the air flow restriction.
Is the repair complete?
| Go to
Step 7
| --
|
5
| Repair the fault to the cooling fan operation. Refer to
Cooling Fan Inoperative
.
Is the repair complete?
| Go to
Step 7
| --
|
6
|
- Air is in the refrigerant system, or the system is overcharged. Refer to the view screen on
J 43600
ACR 2000 Air Conditioning Service Center for foreign gas content in the refrigerant.
- Recover and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging
.
Is the repair complete?
| Go to
Step 7
| --
|
7
|
- Record the low and high side pressures and the I/P panel outlet air temperature after you have performed the repairs.
- Compare the pressures and the panel outlet temperature to those listed in the A/C Performance Chart. Refer to
Air Conditioning (A/C) System Performance Test
.
Are the readings within the specified ranges listed in the A/C Performance table?
| Go to
Step 8
| Go to
Air Conditioning (A/C) System Performance Test
|
8
| Operate the system in order to verify the repair.
Did you find and correct the condition?
| System OK
| Go to
Symptoms - HVAC Systems - Automatic
|
