ESIE17-08
|
Part 3. Repair
3.3. Unit specific repair procedures
15/11/18
|
Version 1.1
Page 75
R32 Sky-Air RZAG-M
3.3.2.3. Replacing 4-way valve body
PRELIMINARY ACTIONS
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to
4. Recover the refrigerant (refer to
"Refrigerant repair procedures" on page 61
).
5. Remove the main PCB (refer to
"Replacing main PCB" on page 92
6. Connect a nitrogen hose to the outdoor suction service port.
7. Attach a hose with core-depressor to allow the release of the nitrogen.
PROCEDURE
Removal
1. Cut the 4-way valve pipes (1).
2. Remove the 4-way valve (2).
3. Supply nitrogen to the piping circuit.
4. Using an oxygen acetylene torch, heat a solder connection of the 4-way valve (2).
5. When the solder material is liquid, pull the 4-way valve pipe (1).
6. Repeat steps 4 and 5 for the 3 remaining 4-way valve pipes (1).
7. Cut the nitrogen supply when the piping has cooled down.
Figure 3-11: Removing 4-way valve body
C
AUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
1. 4-way valve pipe
2. 4-way valve
1
2
1
