Sharp AH-A129E Service Manual page 22

AH-A129E
AU-A129E
The room is not cooled.
The compressor does not operate.
Push the button "TEST" on the
indoor unit, and wait 3 minutes.
Using a meter, measure voltage at
the terminals on the terminal board.
Is there a voltage
between terminal "N" and
"1" of the terminal board the
power supply voltage ?
YES
Measure resistances of TH1 and TH2.
Are the resistances
correct Fig. 1 ?
YES
The control circuit is normal.
The compressor may be defective.
The running capacitor may be defective.
Refrigerant may have leaked.
The outdoor fan motor may be defective.
The outdoor fan motor capacitor may be defective.
CHARACTERISTIC OF TH1 & TH2
K
180
160
140
120
100
80
60
40
20
0
-10 0 10
NO
Replace the PWB ass'y with a new one.
NO
Replace the thermistor ass'y with a new one.
22
10˚C
30K
20 30 40˚C
Fig. 1