Robinair 34788-I Recovery, Recycling, Recharging Unit - Manual (Page 14)

12
Operating Instructions
Recharge the A/C System
1. Press CHARGE. Press CHARGE again to toggle
between a high-side charge, a low-side charge, or
both.
Note:
• Charge mode after injecting oil will allow only a high-
side charge.
• The blue light on the control panel indicates a low-
side charge; the red light indicates a high-side charge.
See Figure 8.
2. Accept the default weight by pressing START / YES,
or type in a weight using the number keys, and
press START / YES.
3. Select START / YES to perform an oil inject; select
STOP / NO to skip the oil inject.
4. After a valid charge weight is entered, the display reads
CHARGE IN PROGRESS / DO NOT DISTURB
X.XX LBS. (X.XX KG)
Moving or bumping the unit at this point may result
in an incorrect reading.
Note:
• During a charge cycle, if the unit fails to transfer
refrigerant due to low tank pressure, the charge
process is automatically interrupted and the unit
operates in a mode to build tank pressure. Once
tank pressure is sufficient, the unit automatically
completes the charge.
• When the charge cycle gets close to the weight
entered in Step 2, the unit slows down. It’ll charge,
settle, charge again, settle, etc., with the blue/red
lights illuminating accordingly.
5. When the charge is complete, the display reads
CHARGED XXX LBS (KG)
PRESS START TO EQUALIZE HOSES
STOP TO EXIT
Press START / YES to equalize pressure in the
service hoses. This ensures all liquid refrigerant
trapped in the hoses is transferred to the vehicle A/C
system for an accurate charge.
Note: Answering STOP / NO to this message will
cause the machine to display
COMPENSATING HOSES
DO NOT DISTURB
Operating Tips
After selecting the CHARGE function and
entering a desired weight, if the weight
entered will leave less than 2 lbs. (.91
kg) of refrigerant in the internal tank after
charge, the charge function will not start.
The display reads
INSUFFICIENT REFRIG.
PRESS ANY KEY TO EXIT
Refer to the Maintenance section of this
manual for instructions to Manually Refill
the Internal Storage Vessel (ISV).
Red Light indicates
High-Side Charge
Blue Light indicates
Low-Side Charge
Figure 8