Daikin Stylish Series - Page 120

2 | Components
Service manual
120
(C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A +
RXA20~35A + RXA42+50B
Split Stylish R32
ESIE18-03C – 2020.02
Prerequisite: Remove the required plate work, see "2.13Plate work"[499].
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 "Checking
procedures"[4119].
No Correctly install the thermistor, see
"Repair procedures"[4122].
To perform an electrical check of the specific thermistor
Prerequisite: First perform a mechanical check of the thermistor, see "Checking
procedures"[4119].
1 Locate the thermistor.
INFORMATION
Remove the thermistor from its holder if not reachable with a contact thermometer.
2 Measure the temperature using a contact thermometer.
Name Symbol Location (PCB) Connector
(pins)
Type
Air thermistor R1T Main (O/U) S90:1‑2 1
Heat
exchanger
thermistor
R2T Main (O/U) S90:3‑4 1
Discharge pipe
thermistor
R3T Main (O/U) S90:5‑6 1
Heat
exchanger
thermistor
R1T Indoor (I/U) S501:1‑2 1
3 Determine the thermistor resistance that matches the measured
temperature.
Type 1 thermistor
T °C kΩ T °C kΩ T °C kΩ T °C kΩ
–20 197.81 10 39.96 40 10.63 70 3.44