CTR Logika Handbuch für Gebrauch und Wartung - Seite 11

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9. Manual operation "VACUUM"



1) LP and HP valves open

Connect up the high and low-pressure hoses with the A/C plant.

Open the two high and low pressure valves HP-LP (ex. 1) or, in case of only one service

point, open the corresponding valve (ex. 2).

Use the SEL key to select VACUUM, indicated by the lateral led light.

The display visualizes the pre-set time of 1800 seconds (30 minutes) that can be

changed by using the "+" and "-" keys.

Press the OK key to proceed with the vacuum function. If the pre-set time doesn't

decrease, after 10 minutes the function will stop and the error code E4 will appear

(time to achieve vacuum expired).

Check leaks: using the countdown function for a maximum of 300 seconds (5 minutes).

In case of leaks the operation will stop and the display will visualize the error code E5

indicating a leak in the plant.

If this phase ends without problems, then the display will visualize "four zeros" (0000)

indicating that the vacuum phase has been completed.

Possible error codes:

E3 = Pressure present in the system at the start or during the vacuum cycle.

E4 = Time to achieve vacuum expired.

E5 = Leaks found in vacuum control cycle.

The VACUUM operation must be carried out with the engine switched off.

Logika - use and maintenance guide

1- Time for vacuum expired

2- Leakage control

3- End of

vacuum phase

2) LP valve open and HP valve closed

3a- Leak

presence

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