Daikin FTXP20-71L Service Manual page 150

4 | Third party components
To add refrigerant
Repair information
Refrigerant piping handling
To perform refrigerant pump down operation
Service manual
150
R Refrigerant
3 To add refrigerant, see
Is the problem solved?
Yes
No
1 See the installer reference guide for the correct procedure.
Is the problem solved?
Yes
No
▪ Make sure that the applied pressure is never higher than the unit design pressure
indicated on the nameplate (PS).
▪ Work according to the F‑gas regulation and/or local regulations.
▪ Make sure the correct amount of refrigerant is charged after repair according to
the F‑gas regulation label on the unit (factory + additional where required).
▪ Make sure to use the appropriate equipment and tools according to the
refrigerant and unit type.
▪ R32 can be charged in gas phase.
▪ Make sure to use a digital scale (no charging cylinder).
▪ Execute correct vacuum drying procedure after repair:
- When using an electronic vacuum gauge with an absolute pressure readout, a
pressure of minimal 2000 micron / 2 Torr / 266 Pa MUST be reached. This
pressure should stay stable for 30 minutes when vacuum pump is NOT running.
If vacuum pressure CANNOT be held, most likely there is still moisture in the
system. Again run the vacuum pump for 1~2 hours to a pressure (absolute
pressure readout) lower than 2000 micron / 2 torr / 266 Pa. If target pressure
CANNOT be reached, again check for leaks.
- Connect the unit according to the available service ports.
- Use related field setting where necessary to open expansion valve / solenoid
valve.
The unit is equipped with an automatic pump down operation which will collect all
refrigerant from the field piping and indoor unit in the outdoor unit. To protect the
environment, make sure to perform the following pump down operation when
relocating the unit.
"4.2.2 Repair procedures" [
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Action
No further actions required.
Return to troubleshooting of the
specific error and continue with the
next procedure.
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
4
148].
Split Comfora R32
ESIE18-01E – 2023.01