Mastercool 69788-A R134a RECOVERY_RECYCLE_RECHARGE - Manual (Page 13)

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ALLOW HIGH AND LOW
PRESSURE TO EQUALIZE
CLOSE ALL VALVES
RESET: WHEN COMPLETE
ASSISTED PROCEDURE
WARNING:
DO NOT STOP THE RECOVERY PROCESS. Stopping the recovery process will definitely cause damage to the Compressor and perhaps other
components. It will also cause the machine to fill up with unprocessed liquid refrigerant which will disable the machine from further use.
Damage due to STOPPING THE RECOVERY PROCESS could void the warranty.
RECOVERY AND RECYCLING
Connect the hoses to the A/C system with the quick-connect couplings, bearing in mind that BLUE must be connected to the low-pressure side and
RED to high pressure. If the A/C system is equipped with a single quick-connect coupling for high or low pressure, connect only the relative coupling
and hose. Check that the high and low pressure valves are closed. Start the vehicle engine and the air conditioner and allow both to run for 5 to 10
minutes with the passenger compartment fan at full speed. Only perform this step if the vehicle’s AC is operational. Switch off the vehicle engine.
Select the assisted procedure by pressing ENTER when “Assisted Procedure” flashes on the LCD. Select recovery and recycling by pressing ENTER
when “Recovery/Recycling” flashes on the LCD.
Open the high and low service valves on the machine and press the START key to begin the refrigerant recovery/recycling phase, which will be
indicated on the LCD as “RECOVERY/RECYCLING .” During this phase, the LCD will display the quantity of refrigerant recovered. Upon completion of
recovery, the machine will stop and automatically discharge the used oil from the A/C system if any was present during recovery. The oil discharge
operation lasts 6 to 14 minutes depending on the ambient temperature and the amount of refrigerant recovered. During the oil discharge operation
the following screen will be displayed.
RECOVERY PAUSED
OIL DRAINING
PLEASE WAIT
TIME: 6 MIN
If any residual refrigerant is left in the A/C system, as indicated by an increase in pressure during the oil discharge phase, recovery will automatically
restart.
Upon completion of discharge, the machine will check for the presence of air in the tank, and if it’s necessary, purge the non condensable gases.
The alarm will sound continuously and the display will show:
AIR PURGE
Recovery ref x: xx lb
Tp: xx psi T: xx ˚F
The recovery/recycle machine will automatically purge non-condensable gases (NCGS) if excess NCGS are detected at the end of recovery. Allow
the unit to complete this procedure to reduce the risk of comebacks that can be caused by charging excess NCGS into an A/C system.
VACUUM
Use the quick-connect couplings to connect the hoses to the A/C system, bearing in mind that BLUE must be connected to the low pressure side
and RED to high pressure. If the system is equipped with a single quick-connect coupling for high or low pressure, connect only the relative hose.
Select the assisted procedure by pressing ENTER when “Assisted Procedure” flashes on the LCD. Select the vacuum operation, when the message
“Vacuum xx min.” flashes on the LCD. Set the vacuum time only if different from that previously used. Press ENTER to confirm. Open the high and
low pressure valves of the machine and press START.
VACUUM LEAK TEST
The machine will automatically perform a 2 minute VACUUM LEAK TEST when the time value is 11 minutes or longer. The VACUUM LEAK TEST
will start after 10 minutes of vacuuming. If a leak is detected the machine will notify the operator that a leak was detected and it will not continue
vacuuming. If no leak is detected, the machine will continue vacuuming for the time remaining.
ADDING NEW OIL (Fig. 10)
Measure the quantity of oil extracted from the A/C system and check that the new oil container contains at least .67 oz (20 cc.) With the A/C system
in vacuum, open the high and low pressure valves of the machine (if the A/C system is equipped with a single quick-connect coupling for high or low
pressure, open only the relative valve). Open the oil valve until the quantity equal to the quantity of oil previously extracted is transferred. Close the