Daikin Sky Air FAA71BUV1B Service Manual page 79

FAA71+100BUV1B
Sky Air indoor units
ESIE22-01 – 2022.02
T °C kΩ T °C
–9 106.03 21
–8 100.41 22
–7 95.14 23
–6 90.17 24
–5 85.49 25
–4 81.08 26
–3 76.93 27
–2 73.01 28
–1 69.32 29
0 65.84 30
1 62.54 31
2 59.43 32
3 56.49 33
4 53.71 34
5 51.09 35
6 48.61 36
7 46.26 37
8 44.05 38
9 41.95 39
5 Disconnect the thermistor connector from the appropriate PCB.
6 Measure the resistance between the appropriate pins of the thermistor
connector.
7 Check that the measured resistance value matches the resistance determined
through the measured temperature (earlier step in the procedure).
▪ E.g. R1T thermistor:
▪ Measured temperature with contact thermometer: 23.1°C,
▪ Resistance value determined through temperature (using the thermistor
table A):
Resistance at 20°C: 24.6 kΩ,
Resistance at 25°C: 19.6 kΩ,
▪ Disconnect connector and measure resistance between X16A pin 1‑2:
Measured resistance: 22.6 kΩ,
▪ Measured resistance value is inside the range. R1T thermistor passes the
check.
INFORMATION
All thermistors have a resistance tolerance of 3%.
INFORMATION
Connect the service monitoring tool to the unit or use field settings mode 1 (see
service manual of the outdoor unit) to monitor the thermistors.
If the measured resistance value matches the resistance determined through the
measured temperature, but the temperature for the corresponding thermistor via
service monitoring tool or field settings mode 1 is NOT correct, replace the applicable
PCB.
kΩ T °C kΩ
23.91 51 6.91
22.85 52 6.65
21.85 53 6.41
20.90 54 6.65
20.00 55 6.41
19.14 56 6.18
18.32 57 5.95
17.54 58 5.74
16.80 59 5.14
16.10 60 4.87
15.43 61 4.70
14.79 62 4.54
14.18 63 4.38
13.59 64 4.23
13.04 65 4.08
12.51 66 3.94
12.01 67 3.81
11.52 68 3.68
11.06 69 3.56
4 Components
|
T °C kΩ
Service manual
79