26
AH-S22DP2
AH-S25DP2
AH-S32DP2
100
80
60
40
20
0
-10 0 10 203040
Resistance
Thermistor
Room temperature
Heat exchange
Color
Yellow
Orange
To measure the resistance, first remove
the connector as shown at right.
Room temperature
thermistor TH1
Tester
Signal
CN7
CN7
Figure 1 Temperature properties of indoor thermistors
500K
400K
300K
200K
100K
0
-20 0 20 60 80 100 120
3.06K5.78K
4.17K 2.28K
1.72K
16
40K
30K
20K
10K
0
-20 0 20 60
40
16
Figure 2 Temperature properties of outdoor thermistors
Connector
CN8
TH2 Heat exchange thermistor
TH3 Outdoor temp. thermistor
TH1 compressor thermistor
TH2,TH3
Connector
CN8
Temperature (ϒC)
Temperature (ϒC)
Tester
Tester
Thermistor To measure the
resistance, first
remove the
connector from the
board.
ColorNo. Connector
Compressor
thermistor
Heat exchanger
pipe thermistor
Outdoor temp.
thermistor
TH1
TH2
TH3
No. 1 to 2
No. 3 to 4
Red
Orange
No. 5 to 6
Green
Microcomputer
terminal
Input
signal
To Outdoor control board
Adaptor
(C14 )
(GND)
(R17)
Pin No. 43
Pin No. 42
0
1
0 Low input
1 High input
K
Heat exchange thermistor
TH2 (orange)
25ϒC resistance 15 K
Room temperature
thermistor TH1 (yellow)
25ϒC resistance 10 K
25ϒC resistance
45 K
Resistance ( )
Resistance ( )
0ϒC resistance
14.5 K
25ϒC resistance
4.431 K
Heat exchange
thermistor TH2
Tester
41
Cautions when attaching or removing the board
When operating only the outdoor unit (cooling 40 Hz fixed mode) To make
only the outdoor unit run in cooling mode, short the places marked with
arrows below with an adaptor, and apply a voltage of 220 ~ 240 V AC to 1
and N on the terminal board.
(Avoid operating the outdoor unit alone for long periods of time.)
PC1
PC2
R6
R5
R7
R16
R17
C14
Cool / 40Hz
3
4
1
2
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