Daikin RXTA30B2V1B, Service Manual

Page: 200 / 264

4 | Components
Service manual
200
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
Does the measured resistance of the
thermistor match with the
temperature determined resistance? Action
Yes Correct the wiring between the
thermistor connector on the PCB and
the intermediate connector, see
"7.2 Wiring diagram" [
4
232].
No Replace the specific thermistor, see
"4.22.2 Repair procedures" [
4
200].
4.22.2 Repair procedures
To remove the thermistor
Indoor unit air (room) thermistor
▪ FTXTA-B UNITS
As the indoor unit air (room) thermistor is located on the humidity sensor PCB,
replace the humidity sensor assembly, see
"4.7.2 Repair procedures" [
4
87].
▪ FTXTM-R UNITS
As the indoor unit air (room) thermistor is located on the display PCB, remove the
display PCB as described in the steps below:
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "4.17 Plate work" [
4
144].
1 Remove the display panel from the indoor unit.
2 Pull up the bottom of the indication lamp cover.
a
b
a Indication lamp cover
b Display PCB
3 Remove the display PCB from the back side of the indication lamp cover.
4 Disconnect the connector from the display PCB.
5 To install the indoor unit air (room) thermistor, see "4.22.2 Repair
procedures" [ 4 200].
▪ FTXTP-M AND ATXTP-M UNITS