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Components
Service manual
257
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Thermistor – Table B
T °C
kΩ
T °C
kΩ
T °C
kΩ
T °C
kΩ
0
5
10
15
20
25
30
35
806.5
618.9
478.8
373.1
292.9
231.4
184.1
147.4
40
45
50
55
60
65
70
75
118.7
96.13
78.29
64.1
52.76
43.63
36.26
30.27
80
85
90
95
100
105
110
115
25.38
21.37
18.06
15.33
13.06
11.17
9.585
8.254
120
125
130
135
140
145
150
7.131
6.181
5.374
4.686
4.098
3.594
3.161
5
Disconnect the thermistor connector from the appropriate PCB and measure
the resistance between the appropriate pins of the thermistor connector.
6
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 23°C: 21.85 kΩ,
Resistance at 24°C: 20.90 kΩ,
▪
Disconnect connector and measure resistance between X5A pin 1‑2:
Measured resistance: 21.86 kΩ,
▪
Measured resistance value is inside the range. R1T thermistor passes the
check.
INFORMATION
All thermistors have a resistance tolerance of 3%.
INFORMATION
In most cases, the user interface allows to monitor the thermistors.
If the measured resistance value matches the resistance determined through the
measured temperature, but the temperature for the corresponding thermistor is
NOT correct on the user interface display, replace the applicable PCB.
INFORMATION
See the overview of the thermistors at the start of the procedure and the
314] to determine if the specific thermistor is either:
▪
Directly connected to the PCB
▪
Connected to an intermediate connector which is connected to the PCB
For thermistors directly connected to the PCB
Does the measured resistance of the
thermistor match with the
temperature determined resistance?
Then
Yes
Thermistor is OK. Return to the
troubleshooting of the specific error
and continue with the next procedure.
Summary of Contents for ALTHERMA
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