Daikin VRV IV+ Service Manual page 273

To install the high pressure switch
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
6 Remove the high pressure switch from the unit.
7 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
8 Heat the end of the high pressure switch pipe using an oxygen acetylene torch
and remove the high pressure switch pipe end.
9 Stop the nitrogen supply when the piping has cooled down.
10 To install the high pressure switch, see
1 Install the high pressure switch in the correct location.
2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
3 Wrap a wet rag around the high pressure switch and solder the high pressure
switch pipe to the high pressure switch.
a
c
e
c
d
a High pressure switch
b High pressure switch pipe
c Screw
d Clamp
e Plate
CAUTION
Overheating the pressure switch will damage or destroy it.
4 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.
5 Install the clamps, the screws and the plate.
6 Route the high pressure switch harness towards the appropriate PCB.
7 Connect the high pressure switch connector to the PCB.
8 Install new tie straps to fix the high pressure switch harness.
9 Add refrigerant
4
procedures" [ 368].
Is the problem solved?
Yes
No
"3.9.2 Repair
to the refrigerant
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
3 Components
|
4
procedures" [ 272].
d
b
circuit, see "4.2.2 Repair
Service manual
273