Mastercool 69788 RECOVERY_RECYCLE_RECHARGE - Manual (Page 14)

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coupling, open only the relative valve on the machine). NOTE: Charging may not run to completion due to pressure balance between the internal
tank and the A/C system. If this occurs, close the valve on the high pressure quick connect coupling (leaving the low-pressure side open), turn on
the vehicle and switch on the A/C system. The unit is equipped with a tank heater to limit this occurrence. When the charging operation is
complete, the machine will display:
END OF CHARGE
Close HP and LP
Press START to continue
Close the high and low service valves. Start the vehicle engine and the A/C system and allow both to run for at least 3 minutes. At this point the
system will be at a steady state and it will be possible to check the high and low pressure valves on the relative pressure gauges. Close the valve
on the high-pressure (RED) quick-connect coupling. Then, with the A/C system still running, open the high and low service valves to enable the
A/C system to evacuate the refrigerant contained in the hoses. When the high and low side pressure is equal, close both service valves and the
valve on the low side coupling. Then disconnect the low and high pressure coupling from the vehicle A/C system and switch off the engine.
ROUTINE MAINTENANCE
FILLING THE MACHINE TANK
This operation must be performed whenever the available refrigerant fluid in the tank is less than 9 lbs (4.8 kg) and must be performed when the
“Empty Tank” alarm is displayed. Recommended capacity is between 10 and 15 lbs.
Obtain a tank of R134a. Connect the tank adapter fitting (69788-332) to the R134a tank. Then, connect the high pressure hose from the tank to the
high pressure valve on the machine. Open both the valve on the external tank and the high pressure valve on the machine. If the external tank is not
supplied with a liquid valve, turn it upside down to obtain a higher delivery rate.
Switch the machine on. The MAIN MENU will appear after a few seconds:
AUTOMATIC PROCEDURE
ASSISTED PROCEDURE
<NEXT MENU>
Ref avail X,XX lb
Select NEXT MENU:
CALIBRATION
DATA AND CONFIGURAT.
SERVICE ALARM
<TANK CHARGING>
Select TANK CHARGING:
TANK CHARGING
Set amount xx lb
Min: x Max: xx lb
Press START
Set the quantity of refrigerant and press START to confirm:
Follow the instructions on the screen.
Use the HP hose to
connect the external
tank and press START
Press START again:
Follow the instructions on the screen.
Open the external
tank valve, open HP
valve, and press START.