Sharp AH-AP18CE Service Manual page 30

AY-AP18CE AY-AP24CE
AH-AP18CEAH-AP24CE
AE-A18CE AE-A24CE
AU-A18CE AU-A24CE
The room is not cooled at all
or not cooled.
The compressor does not operate.
Push the button "AUX." on
the indoor unit, for more than 5 sec.
Using a tester, measure voltage at
the terminals on the terminal board.
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 ?
YES
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.
For AY-AP24CE/AE-A24CE, AH-AP24CE/AU-A24CE
Is the
YES
"4"("2" ..... AU-A24CE) in the outdoor
Measure resistances of TH1 and TH2.
Replace the PWB ass'y with a new one.
Replace the relay in the outdoor unit
with a new one.
NO
Is the voltage
between terminal "N" and
unit the power
supply voltage ?
NO
Are the resistances
conformed Fig. 1 ?
Replace the thermistor ass'y with a new one.
YES
30
NO