Malfunction Of Outdoor Temperature Sensor System - Daikin Skyair FHC35K Service Manual

Troubleshooting by Remote Controller Display / LED Display
6.16

Malfunction of Outdoor Temperature Sensor System

+< +< +< +<
Remote Controller
Display
Outdoor Unit LED
A(H1P)
Display
Applicable Models
R(Y)
Malfunction
Case where the outdoor temperature sensor has a short or open circuit
Decision
Conditions
„ Failure of outdoor temperature sensor
Supposed Causes
„ Failure of outdoor temperature sensor's connector connection
„ Failure of outdoor unit PC board
Troublshooting
Note: Measure the resistance while referring to the thermistor temperature and resistance conversion table.
Thermistor temperature and resistance conversion table.
Temperature
114
ñ ò ò
1(H2P) 2(H3P)
Disconnect the
outdoor temperature
sensor (R1T) from
X4A on the outdoor
unit PC board and
measure the
resistance.
Is
the thermistor
NO
normal?
(See note)
YES
Suction, heat exchanger(indoor)
outdoor air, outdoor unit suction pipe
sensor (kΩ)
-6.0 90.8
-4.0 81.7
-2.0 73.5
0.0 66.3
2.0 59.8
4.0 54.1
6.0 48.9
8.0 44.3
10.0 40.2
12.0 36.5
14.0 33.2
16.0 30.2
18.0 27.5
20.0 25.1
22.0 23.0
24.0 21.0
26.0 19.2
Outdoor temperature sensor replacement
If contact is OK, replace outdoor unit PC
board.
Temperature Suction, heat exchanger(indoor)
outdoor air, outdoor unit suction pipe
sensor (kΩ)
28.0
30.0
32.0
34.0
36.0
38.0
40.0
42.0
44.0
46.0
48.0
50.0
52.0
54.0
56.0
58.0
Si-71A
(SF018)
17.6
16.2
14.8
13.6
12.5
11.5
10.6
9.8
9.1
8.4
7.8
7.2
6.9
6.2
5.7
5.3
Troubleshooting