Robinair 178012K Recovery, Recycling, Recharging Unit - Manual (Page 19)

Model 178002K/178012K Recovery/Recycling/Recharging Unit
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If the unit beeps continuously, the transfer of refrigerant has stopped before the charging
procedure was completed (see Correcting An Incomplete Transfer).
8. Close the high and low side valves on the control panel and start the A/C-R system.
Compare the gauge readings to the manufacturer’s specifications.
9. Turn off the A/C-R system and disconnect the high side hose from it.
10. Start the A/C-R system and open both the high and low side valves. This will pull
the portion of the programmed charge that is trapped in the hoses into the low side
of the A/C-R system.
11. At the lowest recommended operating pressure, close the low side valve and turn
off the A/C-R system. Disconnect the low side hose from the system.
12. Close the high side valve and turn off the MAIN POWER switch.
CORRECTING AN INCOMPLETE TRANSFER
If the scale value does not change for 30 seconds, the unit beeps continuously to indicate
that the transfer of refrigerant was not completed. There are two reasons for an incom-
plete transfer of refrigerant:
• The pressure in the A/C-R system is equal to the pressure in the tank. The
unit produces an audible signal and shows the weight remaining to complete
the transfer.
1. Close the high side valve on the control panel.
2. Disconnect the high side hose from the A/C-R system.
3. Continue with Step 9 in Charging Procedures.
• The display shows the message “CHECK REFRIGERANT” because there
is not enough refrigerant in the tank.
1. Press HOLD/CONT to interrupt the transfer.
2. Be sure both valves on the tank are closed, then disconnect and remove the tank
from the unit. Replace it with a tank containing additional refrigerant.
3. Press HOLD/CONT again to resume the transfer.
Operating Instructions