Step | Action | Value | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
DEFINITION: The high and low side pressures may be normal or slightly less than normal.
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1 | Were you sent here from the A/C System Performance Test? | -- | Go to Step 2 | |||||||
2 | Refer to the panel air outlet temperatures recorded during the A/C system performance test. Does the discharge air temperature between the right and left center panel outlets vary by more than 4°C (5°F)? | -- | Go to Step 7 | Go to Step 3 | ||||||
3 | Did the customer mention that the A/C system output temperatures are good at first, but then turn warm during extended drives? | -- | Go to Step 4 | Go to Step 5 | ||||||
4 | Increase engine speed to 2,000 RPM. During extended operation of the A/C system, does the low side pressure decrease, possibly accompanied by heavy frost on the liquid line between the expansion device and the evaporator? | -- | Go to Step 5 | |||||||
5 | Refer to the pressures recorded during the A/C system performance test. Inspect for the following conditions: Caution: Refer to Moving Parts and Hot Surfaces Caution in the Preface section.
Do the listed conditions exist? | -- | Go to Step 7 | Go to Step 6 | ||||||
6 | Refer to the pressures recorded during the A/C system performance test. Inspect for the following conditions:
Do the listed conditions exist? | -- | Go to Step 8 | Go to Too Hot in Vehicle | ||||||
7 | The A/C system may be undercharged.
Is the repair complete? | -- | Go to Step 14 | -- | ||||||
8 | The A/C system may be contaminated. View the J 43600 ACR 2000 information screen for detection of foreign gases in the A/C system. Do foreign gases exist? | -- | Go to Step 9 | Go to Step 10 | ||||||
9 |
Is the repair complete? | -- | Go to Step 14 | -- | ||||||
10 | The A/C system may contain too much moisture or air.
Are the panel outlet temperatures within the specified ranges of the A/C Performance Test Table? | -- | Go to Step 15 | Go to Step 11 | ||||||
11 | The A/C system may contain too much refrigerant oil.
Important: Operate the A/C system on low, in order to enhance oil flow to the high side of the system. Was the amount greater than the specified value? | 60 ml (2 oz) | Go to Step 12 | Go to Step 13 | ||||||
12 | Recharge the A/C system but do not add the amount of oil recovered by the J 43600 . Refer to Refrigerant Recovery and Recharging . Are the repairs complete? | -- | Go to Step 14 | -- | ||||||
13 | Recharge the A/C system but do not add the amount of oil recovered by the J 43600 . Refer to Refrigerant Recovery and Recharging . Are the repairs complete? | -- | Go to Step 14 | -- | ||||||
14 |
Are the high and low side pressures and I/P panel outlet temperatures within specifications? | -- | Go to Step 15 | |||||||
15 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | |||||||
