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21
573104 REV C
Operating Instructions
Recharge the Vehicle A/C System
(34788NI-H model)
1. Select CHARGE from the MAIN MENU.
The display shows
Is the service being performed on a system with an electric
compressor using POE oil?
2. If the system does NOT have an electric compressor with
POE oil, select to continue. If the system has an electric
compressor with POE oil, select to ush all residual
oil from the hoses. The user will be prompted to “Connect
service hoses to storage ports and open coupler valves.”
See “Figure 3” on page 19. Continuing will begin the
process of ushing the hoses. Once complete, select
to continue through the Charge process.
3. The user will be prompted to enter service data. Select
once complete to continue. The display shows
Charge: XX.XXX kg on High Side
4. Connect both service hoses to the vehicle’s service ports
and open coupler valves.
5. Use the arrow keys and the numeric keypad to enter the
desired charge amount. Select to change units.
6. Using the arrow keys, maneuver to the charge path
selection. High Side is default. To change, select
on the control panel. This will allow the user to toggle
between high, low, and both side charge paths. The
current selection is indicated on the display.
7. Select to start the charge process. Moving or bumping
the machine at this point may result in an inaccurate
charge. When the charge cycle approaches the desired
weight value, the machine slows down. It will charge,
settle, charge again, settle, etc.
8. When prompted, select to perform hose equalization.
Select to perform hose compensation.
Note: Hose equalization requires the user to start the vehicle.
Hose compensation adds a preset amount of refrigerant to
the chart to compensate for service hose volume.
9. When the CHARGE COMPLETE screen
appears, it includes a summary of charge
results. The user may select to print the
summary, if a printer is installed. Select
to proceed to clear the service hoses.
10. The user will be prompted to close the
coupler valves and disconnect the hoses
from the vehicle. Select to recover any
remaining refrigerant from the hoses. Once
the hose clear is complete, the machine will
return to the Main Menu.
The vehicle A/C system is now ready for use.
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