Mastercool 69788 RECOVERY_RECYCLE_RECHARGE - Manual (Page 9)

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CONTROLS AND CONTROL SYSTEM
Refer to Figure 9.
A1) High pressure gauge
A2) Low pressure gauge
A3) Keyboard A4) LCD: 4 lines, 20 characters
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FIG. 9
FUNCTION SELECTOR KEYBOARD
STOP: Press to interrupt the operation being performed -- recovery - oil discharge - vacuum/oil charging - charging. Press START to resume
operation from the point of interruption. Pressing STOP during an alarm state, error state, or end-of-operation state silences the audible
alarm.
RESET: Press to interrupt the operation being performed. The procedure will be restarted from the beginning.
ENTER: Press to confirm the procedure or operation flashing on the LCD.
↓:
Press to move downward from one procedure or operation to another within a menu.
↑: Press to move upward from one procedure or operation to another within a menu.
START: Press to launch the procedure or operation shown on the display.
NOTE: “Tank” and “Bottle” are both used to describe a refrigerant container.
ALARMS
HIGH PRESSURE ALARM: Beeper and LCD advise when the pressure of the fluid in the circuit reaches 290 psi (20 bar). The recovery
operation is automatically interrupted. See page 17, Purging Non-Condensable Gases.
FULL TANK ALARM: Beeper and LCD advises when the tank is filled to more than 80% of maximum capacity; that is,
24 lbs (10.8 kg.) The RECOVERY operation is automatically interrupted. To cancel this alarm, charge one or
more A/C systems before recovering any more refrigerant or, using a scale and a D.O.T. tank,
charge enough refrigerant into the D.O.T. tank so that the refrigerant available will be approximately 12 to 15
lbs. This refrigerant can be reclaimed later should 69788 need to be re-filled again with refrigerant. (See
Empty Tank Alarm)
NOTE: Do not attempt to charge a new refrigerant tank (blue tank with a single port valve). These tanks are
not D.O.T. approved for refilling and only have a check valve in them that allows refrigerant to leave the tank.
Since these tanks have a check valve and DO NOT have pressure safety devices on them they cannot be
refilled by 69788.
NOTE: Never transfer refrigerants to a cylinder or tank unless it is D.O.T. approved for refilling. D.O.T. approval
is indicated by the designation “DOT 4BA” or “DOT 4BW” stamped on a tank’s collar (handle.) If a refrigerant
tank is overfilled, it may explode! Failure to abide by these warnings may cause personal injury or death.
EMPTY TANK ALARM: Beeper and the LCD advise when the quantity of refrigerant fluid contained in the tank is too low. At this time
it will be necessary to bottle fill 69788 to approximately 12 to 15 lbs of refrigerant in order for the alarm to
clear.
SERVICE ALARM: Service Alarm: The first service alarm; when the total recovered amount of refrigerant reaches 114 lbs, a
beeper will sound and the LCD will display SERVICE ALARM. To clear the alarm, press STOP or RESET.
After the first alarm is cleared, filters should be purchased to have ready when 69788 requires that the filters
be replaced. The second service alarm; when the total recovered amount of refrigerant reaches 132 lbs, a