| | Results of the tests |
| 1 | AIR TEMPERATURE CHECK | All OK | Problems met | Operation |
|---|
| Check
the temperature of the air at the vents. | Continue to Step 8 | Ambient temperature at
the vents | Continue to Step 2 |
| Temperature at the vents higher than desired | Continue to Step 3 |
| 2 | CHECKING SYSTEM PRESSURE | All OK | Problems met | Operation |
|---|
| Connect
the climate control system to the repressurizing equipment and check
the system pressure. | Continue to Step 8 | High and low pressure
values below correct figures. | Repressurize the system Op. 5040A10 |
| High and low pressure values above correct figures. | Continue to Step 3 |
| Low pressure value correct, but high pressure value above correct
figure (rapid compressor cycle as engine rpm increases) | Continue to Step 4 |
| Low pressure value high and high pressure value below correct
figure | Replace the compressor Op. 5040A20 |
| High and low pressure vaules do not alter when the air
conditioning is activated. | Replace the compressor Op. 5040A20 |
| 3 | CONDENSER FAN CHECK | All OK | Problems met | Operation |
|---|
| Check
that the fan cools the condenser correctly. | Continue to Step 4 | Electric fan defective | Replace the fan Op. 5040C30 |
| 4 | CIRCUIT LOADING CHECK | All OK | Problems met | Operation |
|---|
| Check
that the system loading is not excessive. | Continue to Step 5 | System loading excessive. | Restore the correct loading Op. 5040A10 |
| 5 | COOLANT CIRCUIT OBSTRUCTION CHECK | All OK | Problems met | Operation |
|---|
| Check
that the pipes and the filter are not obstructed. | Continue to Step 6 | Pipe from compressor to condenser obstructed | Replace the pipe Op. 5040A50 |
| Pipe from condenser to filter obstructed | Replace the pipe Op. 5040A52 |
| Pipe from filter to expansion valve obstructed | Replace the pipe Op. 5040A64 |
| Filter obstructed | Replace the pipe Op. 5040A44 |
| 6 | CONDENSER CHECK | All OK | Problems met | Operation |
|---|
| Check
that the condenser is not blocked. | Continue to Step 7 | Condenser blocked | Replace the condenser Op. 5040A40 |
| 7 | EXPANSION VALVE CHECK | All OK | Problems met | Operation |
|---|
| Check
the operation of the expansion valve. | Continue to Step 8 | Expansion valve defective | Replace the expansion valve Op. 5040B30 |
| 8 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check
that the fault is no longer present | End of diagnosis | Fault persists | |