ENGLISH 49 / 77 CAP. 12 - MANUAL CYCLES
M
ULTIGAS
12.5 FLUSHING (with optional accessories)
After performing a lot of recharge cycles or after replacing components or parts of the /AC circuit
on a vehicle it is advisable to carry out a system flushing.
The system washing (Flushing) consists in purifying the vehicle cooling system through several
R134a or R1234yf gas flushes, by recovering it each time, so that the impurities can be filtered
little by little through the additional filter.
Thanks to its specific design, MULTIGAS 8500 PLUS can automatically manage the flushing
process so that the process becomes fully automatic.
2 flushing modes are available: STANDARD and FLUSHING KIT VAS (both with optional external
kits).
Once the (optional) flushing kit has been installed, as described in the instructions included in the
kit, and after selecting the specific function for the kit being used, start the phase, setting the
desired flushing time
In case of problems or errors during this phase, a message will be displayed, identifying the type
of error.
It is possible to interrupt the phase in progress at any time, by pushing the icon
.
12.6 PRESSURE CHECK
To check the vehicle A/C system status – for instance in case there is no flow of cold air from
flaps – pressure values can be checked.
Connect the HP - LP couplers or the single coupler to the vehicle system.
Perform the following preliminary operations on the vehicle:
• Turn on the A/C system
• Set temperature at minimum level.
• Set fan speed at maximum level; close all the flaps except the central one and set air
distribution to central position.
• Keep engine at accelerated idle at constant speed for at least 2 minutes.
• Check the pressure values within about 3 - 5 minutes.
In the MANUAL CYCLES menu, select the PRESSURE CHECK function.
Open couplers (or the single coupler) rotating knobs clockwise.
After the refrigerant injection, a check of the pressure on HP and LP sides will be requested; make
sure that both values on LP and HP gauges fall within the values shown on the display.
PRESSURE VALUES CHANGE CONSIDERABLY WHEN AMBIENT TEMPERATURE
CHANGES. KEEP THIS IN MIND WHEN CHECKING PRESSURE VALUES
It is possible to interrupt the phase in progress at any time, by pushing the icon .
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