High Pressure Switch; Checking Procedures - Daikin RXTA30B2V1B Service Manual

4.6 High pressure switch

4.6.1 Checking procedures

To perform an electrical check of the high pressure switch
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
2 Route the wiring harness through the harness retainer (top of the switch box).
3 Connect the other end of the front panel motor wiring harness to the indoor
unit main PCB.
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Recuperate the refrigerant from the refrigerant circuit, see
4
procedures" [ 216].
2 Fill the refrigerant circuit with nitrogen until pressurized just below operating
pressure of the high pressure switch.
a
d
c
f
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
High pressure switch
S1PH
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
4
diagram" [ 232].
4 Measure the resistance between the Faston connections of the high pressure
switch.
Result: The switch MUST be closed.
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"4.17 Plate
e b
Operating pressure (MPa) Reset pressure (MPa)
4.03~4.15
4 Components
|
4
work" [ 144].
"5.2.2 Repair
3.05~3.35
"7.2 Wiring
Service manual
83