York HIDS006B21S Service Manual page 48

TROUBLESHOOTING
NOTICE:
This figure is applicable to the following thermistors.
1. Inlet Air Thermistor (THM1), 2. Liquid Pipe Thermistor (Freeze Protection) (THM3), 3. Gas Pipe Thermistor (THM5),
4. Outlet Air Thermistor (THM2), 5. Outside Air Thermistor or Remote Thermistor (THM4)
90
82
80
70
60
Thermistor
50
Resistance
(kΩ)
40
30
20
10
0
5
(-15) (-10) (-5) (0) (5) (10) (15) (20) (25) (30) (35) (40) (45) (50) (55) (60)
3-26
61
46
35
27
20.5
16
12.5
14 23 32 41 50 59 68
Ambient Temperature (
Thermistor Characteristics
10
8
5.3
3.6
77 86 95 104 113 122 131 140
o F( o C))
Indication on Outdoor Unit PCB
(Alarm Code 11 ~ 19)
2.5
Unit No. of
Malfunctioning Indoor Unit
Alarm Code
(11 ~ 19)
SM-18001-rev.1