Control Panel Functions

This explains the functions of the various components of the unit control panel (See Image).

^ Main Power Switch - supplies electrical power to the control panel.
^ Beeper - emits an audible tone to alert the operator to unit operating functions.
^ Digital Display - shows the time programmed for vacuum and the weight of refrigerant programmed for recharging.
^ Low-Side Manifold Gage - when connected to an A/C system, this gage shows the system low-side pressure.
^ High-Side Manifold Gage - when connected to an A/C system, this gage shows the system high-side pressure.
^ Moisture indicator - shows if the refrigerant is wet or dry.
^ Low-Side Valve - connects the low side of the A/C system to the unit.
^ High-Side Valve - connects the high side of the A/C system to the unit.

In addition to the number keys, the control panel contains special keys that accomplish specific operating Functions (See Image).

^ RECYCLE - activates the recycling sequence.
^ RECOVER - activates the recovery sequence.
^ SHIFT/RESET - activates shifted position of keys on the keypad and resets the program mode.
^ FILTER - automatically recovers and evacuates to 57 kPa (17 inches Hg) vacuum from the filter and low side of the unit.
^ CHG - automatically charges the A/C system with the programmed amount of refrigerant.
^ HOLD/CONT - interrupts the automatic cycle in the "HOLD" position, and then resumes functions in the "CONT" position. Press this button once for "HOLD" and again for "CONT."
^ VACUUM - activates the vacuum and automatic recycling sequence.
^ ENTER - enters programmed data into the unit control memory.