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Components
Service manual
336
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
3.18.2 Repair procedures
To remove the refrigerant pressure sensor
Prerequisite:
Stop the unit operation via the central controller.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
315].
Prerequisite:
Recuperate the refrigerant from the refrigerant circuit, see
368].
Prerequisite:
If needed, remove any parts or insulation to create more space for
the removal.
1
Cut all tie straps that fix the refrigerant pressure sensor harness.
2
Disconnect the refrigerant pressure sensor connector from the PCB.
3
Cut the refrigerant pressure sensor pipe using a pipe cutter.
a
b
a
Refrigerant pressure sensor
b
Refrigerant pressure sensor pipe
4
Remove the refrigerant pressure sensor.
5
Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
6
Heat the end of the refrigerant pressure sensor pipe using an oxygen
acetylene torch and remove the refrigerant pressure sensor pipe end.
7
Stop the nitrogen supply when the piping has cooled down.
8
To install the refrigerant pressure sensor, see
To install the refrigerant pressure sensor
1
Install the refrigerant pressure sensor 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 refrigerant pressure sensor and solder the
refrigerant pressure sensor pipe to the refrigerant pressure sensor.
Summary of Contents for VRV IV+
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