Other Thermistors - Daikin FTXA20A Service Manual

2.19.2 Other thermistors

Checking procedures
To perform an electrical check of the fin thermistor
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
5 Fix the thermistor harness using new tie straps
6 Install the insulation around the thermistor.
7 Fix the insulation and the thermistor wire using new tie straps.
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 Locate the thermistor on the appropriate PCB.
2 Measure the temperature using a contact thermometer.
INFORMATION
The thermistors may vary according to the specific unit.
3 Determine the thermistor resistance that matches the measured
temperature.
Thermistor – Table A
T °C kΩ T °C
–20 197.81 10
–19 186.53 11
–18 175.97 12
–17 166.07 13
–16 156.80 14
–15 148.10 15
–14 139.94 16
–13 132.28 17
–12 125.09 18
–11 118.34 19
–10 111.99 20
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"2.14 Plate
kΩ T °C kΩ
39.96 40 10.63
38.08 41 10.21
36.30 42 9.81
34.62 43 9.42
33.02 44 9.06
31.50 45 8.71
30.06 46 8.37
28.70 47 8.05
27.41 48 7.75
26.18 49 7.46
25.01 50 7.18
2 Components
|
4
work" [ 120].
T °C kΩ
70 3.44
71 3.32
72 3.21
73 3.11
74 3.01
75 2.91
76 2.82
77 2.72
78 2.64
79 2.55
80 2.47
Service manual
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