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Components
Service manual
78
(A)(F)TXF20~71A + FTXF20~25B + (A)(F)TXF20~42C + (A)(F)TXF20~42D +
(A)(F)TXF20~42E + (A)RXF20~71A + RXF20~60B + (A)RXF20~42C +
(A)RXF20~42D + (A)RXF20~42E
Split Sensira R32
ESIE18-12G – 2023.01
a
b
e
f
d
c
a
High pressure switch protection control
b
Pressure
c
High pressure switch closed
d
High pressure switch open
e
High pressure switch operating pressure
f
High pressure switch reset pressure
Unit
High pressure
switch
Operating pressure
(MPa)
Reset pressure
(MPa)
RXF20~35A +
RXF20+25B +
RXF20~42C +
ARXF20~35A +
ARXF20~42C +
ARXF42D
S1PH
4.17
3.2
RXF60A
S1PH
4.00
3.2
RXF50~60B +
ARXF50~71A
S1PH
4.15
3.2
3
Disconnect the Faston connectors from the high pressure switch.
INFORMATION
Measure the continuity of all wiring between the high pressure switch and the
appropriate PCB. If NO continuity is measured, repair as needed, see
169].
For (A)RXF20~35A, RXF20+25B, (A)RXF20~42C and (A)RXF42D units ONLY: Make sure
that the compressor thermal protector (which is wired in series with the high
pressure switch) functions correctly, see
4
Measure the resistance between the Faston connections of the high pressure
switch.
Result:
The switch MUST be closed.
5
Fill the refrigerant circuit with nitrogen until pressurized just above operating
pressure of the high pressure switch.
6
Measure the resistance between the Faston connections of the high pressure
switch.
Result:
The switch MUST be open.
INFORMATION
If the high pressure switch was triggered open, it will stay open until the refrigerant
pressure drops below the reset pressure of the high pressure switch.
7
Lower the pressure of the nitrogen in the refrigerant circuit just above reset
pressure of the high pressure switch.