User guide

9
560826 Rev. D, August 23, 2013
Evacuate the A/C System
1.Ensureservicehosesareconnected,and
couplervalvesareOPEN.
2.PressVACUUM.
3. PressSTART / YEStoacceptthedefault
evacuationtimeof10minutes,orenterthe
desiredvacuumtimeusingthenumberkeys,
andpressSTART / YES.
CAUTION: The unit pulls a vacuum on the
vehicle A/C system to remove air and boil off
moisture that may be present in the system.
Evacuate the system for at least 10 minutes,
or follow the A/C system manufacturer’s
specications, to ensure adequate moisture
and contaminant removal.
4.Theunitgivesyoutheoptionofdoingaleak
testafterevacuation.
 PressSTART / YEStoperformtheleaktest.
 PressSTOP / NOtoskiptheleaktestandbegin
evacuation.
5.Theunitstartsthevacuumpumptoevacuate
theA/Csystemandstopswhenthespecied
amountoftimehaselapsed.
 PressSTOP / NOtopausetheprocess.Press
START / YEStoresume,orSTOP / NOagain
toexit.
YouarenowreadytoreplenishtheA/Csystem
withnewoil,ifnecessary,ortorechargethe
systemwithrefrigerant.
Operating Instructions
Operating Tips
• If the vacuum pump has run for 10 or
more hours without an oil change, the
unit displays
VACUUMOILTIMEXX:XX
CHANGEOILNOW?
Refer to instructions outlined in the
Maintenance section under Change
Vacuum Pump Oil.
• Before the unit begins evacuating the A/C
system, it checks for any pressure in the
system that might damage the vacuum
pump. If pressure is detected, the unit
displays
PRESSUREEXISTS
PRESSANYKEYTOEXIT
Press any key to exit, and recover
refrigerant before proceeding.
• If a leak test was selected at the end of
vacuum, and a leak is detected, the unit
displays
LEAKTESTFAILED
PRESSANYKEYTOEXIT
Press any key to exit the evacuation,
perform needed repairs, and repeat the
evacuation.
• To ensure an accurate leak test, it is
imperative that a thorough recovery and
evacuation of the system be performed.
During the recovery process, cold spots
can develop in the automotive system.
Pockets of refrigerant in desiccant and
in system oil will continue to vaporize as
the A/C system temperature equalizes
toward ambient. As this occurs, A/C
system pressure will increase, which may
be interpreted by the unit as a leak.
This will vary somewhat with ambient
temperature conditions.