Daikin Sensira Series, Service Manual

Page: 63 / 172

2 | Components
Service manual
63
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
9 Lower the pressure of the nitrogen in the refrigerant circuit just below reset
pressure of the high pressure switch.
10 Measure the resistance between the Faston connections of the high pressure
switch.
Result: The switch MUST be closed.
High pressure switch connector
measurements are correct? Then
Yes High pressure switch is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
No Replace the high pressure switch, see
"2.4.2 Repair procedures" [
4
63].
2.4.2 Repair procedures
To remove the high pressure switch
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.10 Plate work" [ 4 101].
Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see
"3.2.2 Repair procedures" [
4
133].
1 If needed, remove any parts to create more space for the removal of the high
pressure switch.
2 Disconnect the Faston connectors from the high pressure switch.
a
c
b b
a High pressure switch
b Faston connector
c High pressure switch pipe
3 Cut the high pressure switch pipe using a pipe cutter.
4 Remove the high pressure switch from the unit.
5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
6 Heat the end of the high pressure switch pipe using an oxygen acetylene torch
and remove the high pressure switch pipe end.