[
VII
Troubleshooting ]
- 9 -
HWE12100
GB
VII
Troubleshooting
[1] Troubleshooting
1. Check methods
1. Component and check points
(1) Thermistor
Room temperature thermistor (TH21)
Water inlet thermistor (TH22)
Water outlet thermistor (TH23)
Disconnect the connector and measure the resistance between terminals with a tester.
(Ambient temperature 10°C - 30°C)
1) Thermistor characteristic graph
(2) Fan motor (CNMF)
Refer to the page on "DC fan motor (fan motor/indoor control board)."
Normal
Abnormal
4.3k
- 9.6k
Open or short
(Refer to the thermistor characteristic graph below.)
Low-temperature thermistor
Room temperature thermistor (TH21)
Water inlet thermistor (TH22)
Water outlet thermistor (TH23)
Thermistor R
0
= 15 k
3%
Multiplier of B = 3480 k
2%
0°C 15k
10°C 9.6k
20°C 6.3k
25°C 5.2k
30°C 4.3k
40°C 3.0k
(A) Temperature (°C)
(B) Resistance
(k
)
Rt = 15 exp { 3480(
) }
1
273+t
1
273
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
(A)
(B)
Summary of Contents for CITY MULTI PFFY-WP20VLRMM-E
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