Download Operating Manual - NY Tech Supply

Troubleshooting Tips
USING MANUAL DIAGNOSTICS
WARNING
Be sure to discharge any system pressure before performing any manual
diagnostics.
This unit’s manual diagnostics mode is easily accessible through the keypad.
1. Press SHIFT/RESET and ENTER at the same time. The display should be
blank except for the decimal point.
2. Press the following keys to perform these functions:
Press 1 — Starts the vacuum pump to begin evacuation. Press 1 again (or
SHIFT/RESET) to turn off the pump.
Press 2 — Begins the transfer of refrigerant. The “ADD” message displays
momentarily, then the display shows the amount of refrigerant transferred.
Press HOLD/CONT at any time to interrupt the transfer and again to resume
operation.
Press 3 — Displays the total amount of refrigerant recovered. Each time
recovery is completed, that amount is added to the existing total. To clear the
internal counter, press SHIFT/RESET and ENTER at the same time while
the total is being displayed. The maximum amount recorded is 9,999 pounds
(or 99 kilograms) of refrigerant.
Press 4 — Automatic charge after the vacuum cycle. The display will show
"AUTOMATIC", "VACUUM," and either "00" or "11." "00" indicates a
disabled auto-charge and "11" indicates an enabled auto-charge. Press
ENTER to shift between enabled and disabled auto-charge. Press SHIFT/
RESET to lock in mode choice to memory.
Press 5 — All display segments light up. Press 5 again to turn off.
Press 6 — Displays the approximate weight on the scale.
See CHECKING THE SCALE ACCURACY for diagnostic procedures.
Press 7 — Displays the weight of refrigerant contained in the tank.
3. Press SHIFT/RESET to return to the PROGRAM mode.
Series 17700A/17701A/34700/34701/34704 Enviro-Charge Units
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