Daikin Comfora FTXP20~71L2V1B, Service Manual

Page: 26 / 68

2 Components
Service manual
26
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
b
a
c
a Expansion valve motor
b Pipe retention clip
c Pipe
2 Route the expansion valve motor harness towards the main
PCB.
3 Connect the expansion valve motor connector to the main PCB.
WARNING
When reconnecting a connector to the PCB, do NOT apply
force, as this may damage the connector or connector pins
of the PCB.
4 Fix the expansion valve motor harness using new tie straps.
Is the problem solved? Action
Yes No further actions required.
No Return to "2.3.1 Checking
procedures" on page 23 of the
expansion valve and continue
with the next procedure.
To install the expansion valve motor with bracket
1 Install the expansion valve motor on the expansion valve body.
INFORMATION
The expansion valve motor is equipped with a metal
bracket. Fit the nipples of the metal bracket into the
notches of the expansion valve body.
b c c d e a
a Expansion valve motor
b Metal bracket
c Nipple
d Notch
e Expanion valve body
2 Route the expansion valve motor harness towards the main
PCB.
3 Connect the expansion valve motor connector to the main PCB.
WARNING
When reconnecting a connector to the PCB, do NOT apply
force, as this may damage the connector or connector pins
of the PCB.
4 Fix the expansion valve motor harness using new tie straps.
Is the problem solved? Action
Yes No further actions required.
No Return to "2.3.1 Checking
procedures" on page 23 of the
expansion valve and continue
with the next procedure.
2.4 High pressure switch
2.4.1 Checking procedures
To perform an electrical check of the high
pressure switch
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.10 Plate
work" on page 35 .
1 Disconnect the high pressure switch connector from the PCB.
2 Recuperate the refrigerant from the refrigerant circuit, see
"3.2.2 Repair procedures" on page 46 .
3 Fill the refrigerant circuit with nitrogen until pressurized at
41.5 bar.
4 Measure contacts between the pins 1‑2 of the high pressure
switch connector. The switch MUST be open.
5 Lower the pressure of the nitrogen in the refrigerant circuit to
32 bar.
6 Measure again contacts between the pins 1‑2 of the high
pressure switch connector. The switch MUST be closed.
Both 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" on page 26 .
2.4.2 Repair procedures
To remove the high pressure switch
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.10 Plate
work" on page 35 .
Prerequisite: Recuperate the refrigerant from the refrigerant circuit,
see "3.2.2 Repair procedures" on page 46 .
Prerequisite: If needed, remove any parts to create more space for
the removal of the high pressure switch.
1 Disconnect the connector from the high pressure switch.