ESIE16-02B | Part 3. Repair 3.1. Refrigerant repair procedures
4/04/17 | Version 1.1 Page 61
RA R32 Split & multi split M-Series
Part 3. Repair
This part contains the following chapters:
3.1. Refrigerant repair procedures
Overview:
3.1.1. Refrigerant piping handling
• Make sure the applied pressure is never higher than the unit design pressure as indicated on the nameplate (PS).
• Work according the F-gas regulation and/or local regulations.
• Make sure the correct amount according the F-gas regulation label on the unit (factory + additional where required) of
refrigerant is charged after repair.
• Make sure to use the appropriate equipment and tools according to the refrigerant and unit type.
• Charge non-azeotropic refrigerant (e.g. R-410A) always in a liquid state.
• R32 can be charged in gas phase.
• Make sure to use a digital scale (no charging cylinder).
• Execute correct vacuum drying procedure after repair work:
- -0,1 MPa / -760 mmHg / -750 Torr / -1 bar for at least 1 hour.
- Connect the unit according the available service ports, refer to "Recovery procedure" on page 61.
- Use related field setting where necessary to open expansion valve/solenoid valve.
3.1.2. Recovery procedure
3.1.2.1. Outdoor unit casing
1. Switch off the Daikin unit via the user interface.
2. Manually open the expansion valve (located on the outdoor unit).
3. Connect the vacuum pump, manifold, recovery unit and refrigerant bottle to the service port as shown below.
For the location of the service ports, refer to "Outdoor unit" on page 104.
Refrigerant repair procedures ..............................................................................................................................................................61
Service tools.........................................................................................................................................................................................65
Unit specific repair procedures.............................................................................................................................................................66
Refrigerant piping handling ..................................................................................................................................................................61
Recovery procedure.............................................................................................................................................................................61
Refrigerant pump down ........................................................................................................................................................................63
Piping repair procedures ......................................................................................................................................................................64
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