Download Operating Manual - NY Tech Supply

Maintenance Instructions
There are just a few routine maintenance procedures necessary to keep your unit
operating properly.
CHECKING THE SCALE ACCURACY
To ensure continued charging accuracy, check your scale using these procedures
every thirty (30) days or 100 service jobs, whichever comes first.
Also if the microprocessor senses that calibration has been lost, the "CAL" message
displays. Follow this procedure to check the scale accuracy:
1. While in the PROGRAM mode, press SHIFT/RESET and ENTER at the
same time to enter the diagnostic mode and clear the digital display.
2. Press 6 to display the approximate scale platform weight.
3. Remove the tank from the scale platform. The empty platform weight
displayed should be zero. (± 2 pounds or ±1 kilogram)
• If the displayed weight is not within these limits, the CHECK
REFRIGERANT message will also display. Call the manufacturer.
• If the display does not show the correct weight with ±.1 lb., see "Calibrating
the Scale " section.
4. If the calibration is correct, press SHIFT/RESET to exit.
SHIFT/RESET
ENTER
INST0474
Diagram of Control Panel
Series 17700A/17701A/34700/34701/34704 Enviro-Charge Units
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