Daikin RXTA30B2V1B, Service Manual

Page: 196 / 264

4 | Components
Service manual
196
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
1 Locate the thermistor and remove the insulation if needed. Check that the
thermistor is correctly installed and that there is thermal contact between the
thermistor and the piping or ambient (for air thermistor).
Is the thermistor correctly installed
(thermal contact between the
thermistor and the piping)? Action
Yes Perform an electrical check of the
specific thermistor, see
"4.22.1 Checking procedures" [
4
195].
No Correctly install the thermistor, see
"4.22.2 Repair procedures" [
4
200].
To perform an electrical check of the specific thermistor
1 First perform a mechanical check of the thermistor, see "4.22.1 Checking
procedures" [ 4 195].
2 Locate the thermistor.
INFORMATION
Remove the thermistor from its holder if not reachable with a contact thermometer.
3 Measure the temperature using a contact thermometer.
Outdoor units
Name Symbol Location
(PCB) Connector
(pins) Inter-
mediate
connector
(pins) Referen
ce
(table)
Air
thermistor R1T Main (O/U) S90:1‑2 - A
Heat
exchanger
thermistor R2T Main (O/U) S90:3‑4 - A
Discharge
pipe
thermistor R3T Main (O/U) S90:5‑6 - A
Indoor units FTXTA-B
Name Symbol Location
(PCB) Connector
(pins) Inter-
mediate
connector
(pins) Referen
ce
(table)
Heat
exchanger
thermistor R1T Main (I/U) S501:1‑2 - A
Indoor unit
air (room)
thermistor R2T Humidity
sensor PCB
A5P on
main PCB (I/
U) S600:1‑2 CN1:1‑2 (on
A5P) A