Panasonic CU-E18CKR Service Manual page 68

manifold gauge and purge the air. (2)(4) (Watch the liquid
refrigerant closely at this point.)
8. After adjusting the electronic scale to zero, open the charging
valve, then open the valve Lo of the manifold gauge and charge
with the liquid refrigerant. (2)(5) (Be sure to read the operating
instructions for the electronic scale.)
9. If you cannot charge the stipulated amount, operate the unit in the
cooling mode while charging a little of the liquid at a time (about
150 g/time as a guideline). If the charging amount is insufficient
from one operation, wait aboutone minute, then use the same
procedure to do the liquid charging again.
Precaution:
Never use the gas side to allow a larger amount of liquid
refrigerant to be charged while operating the unit.
10. Close the charging valve, and after charging the liquid
refrigerant inside the charging hose, fully close the valve Lo of the
manifold gauge, and stop the operation of the unit. (2)(5)
11. Quickly remove the charging hose from the service port. (6) If
you stop midway through, the refrigerant that is in the cycle will
be discharged.
12. After putting on the caps for the service port and operating
valve, inspect around the caps for a gas leak. (6)(7)
Fig. 13 Re-charging refrigerant