AH/AY-AP18DR
AH/AY-AP24DR
30
For AY-AP24DR/AE-A24DR, AH-AP24DR/AU-A24DR
The room is not cooled at all
or not cooled.
The compressor does not operate.
Measure resistances of TH1 and TH2.
The control circuit is normal.
The compressor may be defective.
The running capacitor may be defective.
Refrigerant may be leaked.
The outdoor fan motor may be defective.
The outdoor fan motor capacitor may be defective.
Push the button "AUX." on
the indoor unit, for more than 5 sec.
Is the
voltage between
terminal of black lead
wire on the relay in the out door
unit and terminal "N"on the
terminal board the power
supply voltage ?
Are the resistances
conformed Fig. 1 ?
Replace the thermistor ass'y with a new one.
NO
YES
YES
YES
NO
NO
Replace the PWB ass'y with a new one.
Replace the relay in the outdoor unit
with a new one.
Using a tester, measure voltage at
the terminals on the terminal board.
Is the voltage
between terminal "N" and
"4"("2" ..... AU-A24DR) in the outdoor
unit the power
supply voltage ?
